./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --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/weaver/popl20-nonblocking-cntr.wvr.c -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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:35:32,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:35:33,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:35:33,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:35:33,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:35:33,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:35:33,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:35:33,056 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:35:33,057 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:35:33,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:35:33,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:35:33,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:35:33,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:35:33,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:35:33,061 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:35:33,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:35:33,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:35:33,062 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:35:33,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:35:33,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:35:33,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:35:33,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:35:33,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:35:33,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:35:33,068 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:35:33,068 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:35:33,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:35:33,069 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:35:33,069 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:35:33,069 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:35:33,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:35:33,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:35:33,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:35:33,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:35:33,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:35:33,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:35:33,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:35:33,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:35:33,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:35:33,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:35:33,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:35:33,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:35:33,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-11-10 10:35:33,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:35:33,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:35:33,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:35:33,352 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:35:33,353 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:35:33,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-10 10:35:34,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:35:35,077 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:35:35,078 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-10 10:35:35,089 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdd0eac2/ee327e9fe28442e3a6ba84fabf11703c/FLAG101921b59 [2024-11-10 10:35:35,464 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdd0eac2/ee327e9fe28442e3a6ba84fabf11703c [2024-11-10 10:35:35,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:35:35,468 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:35:35,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:35:35,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:35:35,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:35:35,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29640c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35, skipping insertion in model container [2024-11-10 10:35:35,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:35:35,692 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/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-10 10:35:35,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:35:35,707 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:35:35,728 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/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-10 10:35:35,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:35:35,750 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:35:35,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35 WrapperNode [2024-11-10 10:35:35,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:35:35,752 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:35:35,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:35:35,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:35:35,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,779 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-11-10 10:35:35,779 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:35:35,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:35:35,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:35:35,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:35:35,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,810 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-10 10:35:35,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,814 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:35:35,819 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:35:35,819 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:35:35,819 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:35:35,820 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (1/1) ... [2024-11-10 10:35:35,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:35:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:35,864 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 10:35:35,868 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 10:35:35,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:35:35,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:35:35,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:35:35,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:35:35,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:35:35,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:35:35,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:35:35,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:35:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:35:35,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:35:35,928 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 10:35:36,028 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:35:36,031 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:35:36,215 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:35:36,215 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:35:36,361 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:35:36,364 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:35:36,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:35:36 BoogieIcfgContainer [2024-11-10 10:35:36,365 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:35:36,367 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:35:36,367 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:35:36,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:35:36,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:35:35" (1/3) ... [2024-11-10 10:35:36,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6d1117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:35:36, skipping insertion in model container [2024-11-10 10:35:36,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:35" (2/3) ... [2024-11-10 10:35:36,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6d1117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:35:36, skipping insertion in model container [2024-11-10 10:35:36,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:35:36" (3/3) ... [2024-11-10 10:35:36,375 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-11-10 10:35:36,393 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:35:36,393 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:35:36,393 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:35:36,432 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:35:36,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-11-10 10:35:36,496 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-10 10:35:36,496 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:35:36,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-10 10:35:36,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-11-10 10:35:36,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-11-10 10:35:36,522 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:35:36,530 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;@73e10d59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:35:36,531 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:35:36,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:35:36,542 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-11-10 10:35:36,542 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:35:36,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:36,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:36,543 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:36,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1529781213, now seen corresponding path program 1 times [2024-11-10 10:35:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404187561] [2024-11-10 10:35:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:36,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:36,718 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 10:35:36,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404187561] [2024-11-10 10:35:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404187561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:36,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:36,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:35:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846531602] [2024-11-10 10:35:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:36,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:35:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:35:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:35:36,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-10 10:35:36,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:36,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:36,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-10 10:35:36,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:36,863 INFO L124 PetriNetUnfolderBase]: 48/114 cut-off events. [2024-11-10 10:35:36,863 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 10:35:36,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 114 events. 48/114 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 403 event pairs, 31 based on Foata normal form. 17/116 useless extension candidates. Maximal degree in co-relation 187. Up to 87 conditions per place. [2024-11-10 10:35:36,868 INFO L140 encePairwiseOnDemand]: 25/27 looper letters, 15 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2024-11-10 10:35:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 86 flow [2024-11-10 10:35:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:35:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:35:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-11-10 10:35:36,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-11-10 10:35:36,903 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 2 states and 35 transitions. [2024-11-10 10:35:36,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 86 flow [2024-11-10 10:35:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:35:36,907 INFO L231 Difference]: Finished difference. Result has 24 places, 22 transitions, 48 flow [2024-11-10 10:35:36,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=48, PETRI_PLACES=24, PETRI_TRANSITIONS=22} [2024-11-10 10:35:36,911 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-10 10:35:36,912 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 22 transitions, 48 flow [2024-11-10 10:35:36,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:36,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:36,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:36,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:35:36,913 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:36,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash 323033365, now seen corresponding path program 1 times [2024-11-10 10:35:36,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:36,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094672656] [2024-11-10 10:35:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:36,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:37,073 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 10:35:37,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094672656] [2024-11-10 10:35:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094672656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:37,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:37,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:35:37,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186626800] [2024-11-10 10:35:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:37,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:35:37,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:35:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:35:37,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2024-11-10 10:35:37,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 10:35:37,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:37,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2024-11-10 10:35:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:37,202 INFO L124 PetriNetUnfolderBase]: 81/186 cut-off events. [2024-11-10 10:35:37,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:35:37,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 186 events. 81/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 674 event pairs, 33 based on Foata normal form. 8/179 useless extension candidates. Maximal degree in co-relation 337. Up to 105 conditions per place. [2024-11-10 10:35:37,204 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 21 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-10 10:35:37,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 113 flow [2024-11-10 10:35:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:35:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:35:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-11-10 10:35:37,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-11-10 10:35:37,207 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 48 flow. Second operand 4 states and 57 transitions. [2024-11-10 10:35:37,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 113 flow [2024-11-10 10:35:37,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:35:37,210 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 62 flow [2024-11-10 10:35:37,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2024-11-10 10:35:37,211 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2024-11-10 10:35:37,211 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 62 flow [2024-11-10 10:35:37,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 10:35:37,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:37,212 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:37,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:35:37,212 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:37,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1382937487, now seen corresponding path program 1 times [2024-11-10 10:35:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:37,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562796877] [2024-11-10 10:35:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:37,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:37,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:37,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562796877] [2024-11-10 10:35:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562796877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:37,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:35:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720727384] [2024-11-10 10:35:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:37,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:35:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:35:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:35:37,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2024-11-10 10:35:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2024-11-10 10:35:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:37,467 INFO L124 PetriNetUnfolderBase]: 108/253 cut-off events. [2024-11-10 10:35:37,468 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-10 10:35:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 253 events. 108/253 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1026 event pairs, 66 based on Foata normal form. 13/258 useless extension candidates. Maximal degree in co-relation 505. Up to 156 conditions per place. [2024-11-10 10:35:37,472 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 22 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-11-10 10:35:37,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 137 flow [2024-11-10 10:35:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:35:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:35:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-10 10:35:37,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-10 10:35:37,476 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 62 flow. Second operand 4 states and 56 transitions. [2024-11-10 10:35:37,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 137 flow [2024-11-10 10:35:37,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:35:37,478 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 72 flow [2024-11-10 10:35:37,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-11-10 10:35:37,479 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2024-11-10 10:35:37,480 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 72 flow [2024-11-10 10:35:37,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:37,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:37,481 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:37,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:35:37,481 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:37,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 843055127, now seen corresponding path program 1 times [2024-11-10 10:35:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:37,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870966357] [2024-11-10 10:35:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:37,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:37,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870966357] [2024-11-10 10:35:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870966357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:37,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62911547] [2024-11-10 10:35:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:37,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:37,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:37,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:35:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:37,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:35:37,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:37,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62911547] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:38,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:35:38,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-11-10 10:35:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937956484] [2024-11-10 10:35:38,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:38,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:35:38,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:35:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 10:35:38,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-10 10:35:38,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 10:35:38,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:38,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-10 10:35:38,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:38,395 INFO L124 PetriNetUnfolderBase]: 153/382 cut-off events. [2024-11-10 10:35:38,395 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-10 10:35:38,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 382 events. 153/382 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1816 event pairs, 23 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 819. Up to 97 conditions per place. [2024-11-10 10:35:38,402 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 35 selfloop transitions, 5 changer transitions 3/50 dead transitions. [2024-11-10 10:35:38,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 50 transitions, 238 flow [2024-11-10 10:35:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:35:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:35:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-10 10:35:38,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-11-10 10:35:38,406 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 72 flow. Second operand 4 states and 75 transitions. [2024-11-10 10:35:38,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 50 transitions, 238 flow [2024-11-10 10:35:38,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 50 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:35:38,408 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 106 flow [2024-11-10 10:35:38,410 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-10 10:35:38,411 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-10 10:35:38,412 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 106 flow [2024-11-10 10:35:38,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 10:35:38,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:38,412 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:38,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 10:35:38,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:38,617 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:38,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1716408623, now seen corresponding path program 2 times [2024-11-10 10:35:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:38,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981636930] [2024-11-10 10:35:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981636930] [2024-11-10 10:35:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981636930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610345229] [2024-11-10 10:35:38,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:35:38,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:38,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:38,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:35:38,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:35:38,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:38,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:35:38,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:38,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:39,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610345229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:39,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:39,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-10 10:35:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655206759] [2024-11-10 10:35:39,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:39,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:35:39,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:39,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:35:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:35:39,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-11-10 10:35:39,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 106 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 10:35:39,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:39,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-11-10 10:35:39,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:39,269 INFO L124 PetriNetUnfolderBase]: 319/693 cut-off events. [2024-11-10 10:35:39,270 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-11-10 10:35:39,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 693 events. 319/693 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3669 event pairs, 49 based on Foata normal form. 18/693 useless extension candidates. Maximal degree in co-relation 1697. Up to 298 conditions per place. [2024-11-10 10:35:39,275 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 41 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-11-10 10:35:39,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 341 flow [2024-11-10 10:35:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:35:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:35:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-11-10 10:35:39,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-11-10 10:35:39,277 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 106 flow. Second operand 6 states and 83 transitions. [2024-11-10 10:35:39,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 341 flow [2024-11-10 10:35:39,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 341 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:35:39,280 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 227 flow [2024-11-10 10:35:39,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-10 10:35:39,281 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2024-11-10 10:35:39,281 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 227 flow [2024-11-10 10:35:39,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 10:35:39,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:39,282 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:39,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:35:39,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:39,483 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:39,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1486900603, now seen corresponding path program 3 times [2024-11-10 10:35:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:39,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073756458] [2024-11-10 10:35:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073756458] [2024-11-10 10:35:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073756458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126017364] [2024-11-10 10:35:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:35:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:39,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:39,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:35:39,684 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:35:39,684 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:39,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:35:39,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:39,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:39,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126017364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:39,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:39,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-10 10:35:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932869319] [2024-11-10 10:35:39,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:39,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:35:39,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:35:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:35:40,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 227 flow. Second operand has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 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 10:35:40,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:40,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:40,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:40,919 INFO L124 PetriNetUnfolderBase]: 1264/2274 cut-off events. [2024-11-10 10:35:40,919 INFO L125 PetriNetUnfolderBase]: For 3556/3556 co-relation queries the response was YES. [2024-11-10 10:35:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6905 conditions, 2274 events. 1264/2274 cut-off events. For 3556/3556 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13302 event pairs, 77 based on Foata normal form. 36/2310 useless extension candidates. Maximal degree in co-relation 6893. Up to 404 conditions per place. [2024-11-10 10:35:40,940 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 146 selfloop transitions, 77 changer transitions 17/243 dead transitions. [2024-11-10 10:35:40,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 243 transitions, 1857 flow [2024-11-10 10:35:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:35:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:35:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 314 transitions. [2024-11-10 10:35:40,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-11-10 10:35:40,946 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 227 flow. Second operand 28 states and 314 transitions. [2024-11-10 10:35:40,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 243 transitions, 1857 flow [2024-11-10 10:35:40,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 243 transitions, 1845 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-10 10:35:40,964 INFO L231 Difference]: Finished difference. Result has 84 places, 118 transitions, 1086 flow [2024-11-10 10:35:40,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1086, PETRI_PLACES=84, PETRI_TRANSITIONS=118} [2024-11-10 10:35:40,965 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 57 predicate places. [2024-11-10 10:35:40,965 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 118 transitions, 1086 flow [2024-11-10 10:35:40,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 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 10:35:40,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:40,965 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:40,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:35:41,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:41,172 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:41,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -620324079, now seen corresponding path program 4 times [2024-11-10 10:35:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265391211] [2024-11-10 10:35:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:41,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265391211] [2024-11-10 10:35:41,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265391211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840690551] [2024-11-10 10:35:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:35:41,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:41,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:41,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:35:41,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:35:41,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:41,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:35:41,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:41,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840690551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:41,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-10 10:35:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242530509] [2024-11-10 10:35:41,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:41,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:35:41,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:35:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:35:41,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:41,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 118 transitions, 1086 flow. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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 10:35:41,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:41,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:41,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:42,599 INFO L124 PetriNetUnfolderBase]: 1639/2998 cut-off events. [2024-11-10 10:35:42,600 INFO L125 PetriNetUnfolderBase]: For 14622/14622 co-relation queries the response was YES. [2024-11-10 10:35:42,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12998 conditions, 2998 events. 1639/2998 cut-off events. For 14622/14622 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18525 event pairs, 133 based on Foata normal form. 82/3079 useless extension candidates. Maximal degree in co-relation 12970. Up to 1144 conditions per place. [2024-11-10 10:35:42,629 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 193 selfloop transitions, 142 changer transitions 4/342 dead transitions. [2024-11-10 10:35:42,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 342 transitions, 3473 flow [2024-11-10 10:35:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:35:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:35:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 311 transitions. [2024-11-10 10:35:42,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.443019943019943 [2024-11-10 10:35:42,632 INFO L175 Difference]: Start difference. First operand has 84 places, 118 transitions, 1086 flow. Second operand 26 states and 311 transitions. [2024-11-10 10:35:42,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 342 transitions, 3473 flow [2024-11-10 10:35:42,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 342 transitions, 3358 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-11-10 10:35:42,675 INFO L231 Difference]: Finished difference. Result has 127 places, 214 transitions, 2530 flow [2024-11-10 10:35:42,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2530, PETRI_PLACES=127, PETRI_TRANSITIONS=214} [2024-11-10 10:35:42,676 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 100 predicate places. [2024-11-10 10:35:42,676 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 214 transitions, 2530 flow [2024-11-10 10:35:42,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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 10:35:42,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:42,677 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:42,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:35:42,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:42,881 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:42,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash -490298945, now seen corresponding path program 5 times [2024-11-10 10:35:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:42,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000226284] [2024-11-10 10:35:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000226284] [2024-11-10 10:35:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000226284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312258888] [2024-11-10 10:35:43,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:35:43,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:43,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:43,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:35:43,090 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:35:43,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:43,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:35:43,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:43,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:43,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312258888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:43,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-10 10:35:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276721473] [2024-11-10 10:35:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:43,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:35:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:35:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:35:43,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:43,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 214 transitions, 2530 flow. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 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 10:35:43,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:43,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:43,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:44,846 INFO L124 PetriNetUnfolderBase]: 2267/4178 cut-off events. [2024-11-10 10:35:44,846 INFO L125 PetriNetUnfolderBase]: For 42493/42501 co-relation queries the response was YES. [2024-11-10 10:35:44,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22942 conditions, 4178 events. 2267/4178 cut-off events. For 42493/42501 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27869 event pairs, 129 based on Foata normal form. 88/4266 useless extension candidates. Maximal degree in co-relation 22895. Up to 731 conditions per place. [2024-11-10 10:35:44,894 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 215 selfloop transitions, 287 changer transitions 2/507 dead transitions. [2024-11-10 10:35:44,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 507 transitions, 6649 flow [2024-11-10 10:35:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 10:35:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-10 10:35:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 406 transitions. [2024-11-10 10:35:44,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4064064064064064 [2024-11-10 10:35:44,897 INFO L175 Difference]: Start difference. First operand has 127 places, 214 transitions, 2530 flow. Second operand 37 states and 406 transitions. [2024-11-10 10:35:44,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 507 transitions, 6649 flow [2024-11-10 10:35:45,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 507 transitions, 6259 flow, removed 193 selfloop flow, removed 1 redundant places. [2024-11-10 10:35:45,010 INFO L231 Difference]: Finished difference. Result has 183 places, 367 transitions, 5306 flow [2024-11-10 10:35:45,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5306, PETRI_PLACES=183, PETRI_TRANSITIONS=367} [2024-11-10 10:35:45,013 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 156 predicate places. [2024-11-10 10:35:45,015 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 367 transitions, 5306 flow [2024-11-10 10:35:45,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 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 10:35:45,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:45,016 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:45,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:35:45,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:45,217 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:45,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 437177161, now seen corresponding path program 6 times [2024-11-10 10:35:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:45,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342936939] [2024-11-10 10:35:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342936939] [2024-11-10 10:35:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342936939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:45,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896183189] [2024-11-10 10:35:45,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:35:45,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:45,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:45,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:45,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:35:45,420 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:35:45,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:45,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 10:35:45,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:45,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896183189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:45,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:45,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-10 10:35:45,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507230858] [2024-11-10 10:35:45,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:45,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:35:45,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:35:45,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:35:45,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 367 transitions, 5306 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 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 10:35:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:47,695 INFO L124 PetriNetUnfolderBase]: 2599/4800 cut-off events. [2024-11-10 10:35:47,696 INFO L125 PetriNetUnfolderBase]: For 81458/81458 co-relation queries the response was YES. [2024-11-10 10:35:47,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31094 conditions, 4800 events. 2599/4800 cut-off events. For 81458/81458 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32846 event pairs, 150 based on Foata normal form. 36/4836 useless extension candidates. Maximal degree in co-relation 31025. Up to 1299 conditions per place. [2024-11-10 10:35:47,763 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 243 selfloop transitions, 364 changer transitions 6/616 dead transitions. [2024-11-10 10:35:47,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 616 transitions, 9675 flow [2024-11-10 10:35:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-10 10:35:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-10 10:35:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 368 transitions. [2024-11-10 10:35:47,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41301907968574636 [2024-11-10 10:35:47,766 INFO L175 Difference]: Start difference. First operand has 183 places, 367 transitions, 5306 flow. Second operand 33 states and 368 transitions. [2024-11-10 10:35:47,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 616 transitions, 9675 flow [2024-11-10 10:35:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 616 transitions, 9005 flow, removed 298 selfloop flow, removed 7 redundant places. [2024-11-10 10:35:48,085 INFO L231 Difference]: Finished difference. Result has 221 places, 470 transitions, 7678 flow [2024-11-10 10:35:48,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7678, PETRI_PLACES=221, PETRI_TRANSITIONS=470} [2024-11-10 10:35:48,086 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 194 predicate places. [2024-11-10 10:35:48,086 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 470 transitions, 7678 flow [2024-11-10 10:35:48,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 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 10:35:48,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:48,087 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:48,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:35:48,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:48,288 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:48,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -436341119, now seen corresponding path program 7 times [2024-11-10 10:35:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103000468] [2024-11-10 10:35:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103000468] [2024-11-10 10:35:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103000468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106649833] [2024-11-10 10:35:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:35:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:48,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:48,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:48,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:35:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:48,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:35:48,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:48,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106649833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:48,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:48,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-10 10:35:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702615625] [2024-11-10 10:35:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:35:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:35:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:35:48,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:48,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 470 transitions, 7678 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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 10:35:48,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:48,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:48,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:50,811 INFO L124 PetriNetUnfolderBase]: 2782/5107 cut-off events. [2024-11-10 10:35:50,811 INFO L125 PetriNetUnfolderBase]: For 107655/107667 co-relation queries the response was YES. [2024-11-10 10:35:50,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 5107 events. 2782/5107 cut-off events. For 107655/107667 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35204 event pairs, 213 based on Foata normal form. 28/5135 useless extension candidates. Maximal degree in co-relation 35603. Up to 1660 conditions per place. [2024-11-10 10:35:50,879 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 278 selfloop transitions, 334 changer transitions 1/616 dead transitions. [2024-11-10 10:35:50,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 616 transitions, 10853 flow [2024-11-10 10:35:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:35:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:35:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 308 transitions. [2024-11-10 10:35:50,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-11-10 10:35:50,881 INFO L175 Difference]: Start difference. First operand has 221 places, 470 transitions, 7678 flow. Second operand 28 states and 308 transitions. [2024-11-10 10:35:50,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 616 transitions, 10853 flow [2024-11-10 10:35:51,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 616 transitions, 10561 flow, removed 104 selfloop flow, removed 9 redundant places. [2024-11-10 10:35:51,414 INFO L231 Difference]: Finished difference. Result has 250 places, 520 transitions, 9354 flow [2024-11-10 10:35:51,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9354, PETRI_PLACES=250, PETRI_TRANSITIONS=520} [2024-11-10 10:35:51,415 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 223 predicate places. [2024-11-10 10:35:51,416 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 520 transitions, 9354 flow [2024-11-10 10:35:51,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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 10:35:51,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:51,416 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:51,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 10:35:51,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:51,621 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:51,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1653786863, now seen corresponding path program 8 times [2024-11-10 10:35:51,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:51,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818843165] [2024-11-10 10:35:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:51,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818843165] [2024-11-10 10:35:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818843165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152387600] [2024-11-10 10:35:51,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:35:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:51,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:51,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:35:51,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:35:51,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:51,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 10:35:51,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:51,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152387600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:52,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:52,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-11-10 10:35:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373532118] [2024-11-10 10:35:52,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:52,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:35:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:35:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:35:52,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:52,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 520 transitions, 9354 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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 10:35:52,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:52,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:52,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:55,032 INFO L124 PetriNetUnfolderBase]: 4303/7847 cut-off events. [2024-11-10 10:35:55,032 INFO L125 PetriNetUnfolderBase]: For 166075/166087 co-relation queries the response was YES. [2024-11-10 10:35:55,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59427 conditions, 7847 events. 4303/7847 cut-off events. For 166075/166087 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 57516 event pairs, 78 based on Foata normal form. 78/7925 useless extension candidates. Maximal degree in co-relation 59339. Up to 1358 conditions per place. [2024-11-10 10:35:55,129 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 451 selfloop transitions, 692 changer transitions 135/1281 dead transitions. [2024-11-10 10:35:55,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1281 transitions, 24757 flow [2024-11-10 10:35:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 10:35:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-10 10:35:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 414 transitions. [2024-11-10 10:35:55,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2024-11-10 10:35:55,134 INFO L175 Difference]: Start difference. First operand has 250 places, 520 transitions, 9354 flow. Second operand 37 states and 414 transitions. [2024-11-10 10:35:55,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1281 transitions, 24757 flow [2024-11-10 10:35:56,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1281 transitions, 24319 flow, removed 91 selfloop flow, removed 13 redundant places. [2024-11-10 10:35:56,418 INFO L231 Difference]: Finished difference. Result has 293 places, 860 transitions, 18496 flow [2024-11-10 10:35:56,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9089, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18496, PETRI_PLACES=293, PETRI_TRANSITIONS=860} [2024-11-10 10:35:56,419 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 266 predicate places. [2024-11-10 10:35:56,419 INFO L471 AbstractCegarLoop]: Abstraction has has 293 places, 860 transitions, 18496 flow [2024-11-10 10:35:56,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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 10:35:56,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:56,420 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:56,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 10:35:56,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 10:35:56,620 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:56,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1236476445, now seen corresponding path program 9 times [2024-11-10 10:35:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:56,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30181611] [2024-11-10 10:35:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:56,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30181611] [2024-11-10 10:35:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30181611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570656606] [2024-11-10 10:35:56,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:35:56,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:56,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:56,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:35:56,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:35:56,808 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:35:56,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:56,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:35:56,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:56,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570656606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:57,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:57,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-11-10 10:35:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334632272] [2024-11-10 10:35:57,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:57,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 10:35:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 10:35:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-10 10:35:57,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:35:57,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 860 transitions, 18496 flow. Second operand has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 17 states have internal predecessors, (135), 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 10:35:57,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:57,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:35:57,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:00,257 INFO L124 PetriNetUnfolderBase]: 4978/9145 cut-off events. [2024-11-10 10:36:00,257 INFO L125 PetriNetUnfolderBase]: For 271820/271820 co-relation queries the response was YES. [2024-11-10 10:36:00,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78574 conditions, 9145 events. 4978/9145 cut-off events. For 271820/271820 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 69670 event pairs, 272 based on Foata normal form. 69/9213 useless extension candidates. Maximal degree in co-relation 78469. Up to 3059 conditions per place. [2024-11-10 10:36:00,387 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 388 selfloop transitions, 948 changer transitions 11/1350 dead transitions. [2024-11-10 10:36:00,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1350 transitions, 30891 flow [2024-11-10 10:36:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-10 10:36:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-10 10:36:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 336 transitions. [2024-11-10 10:36:00,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-11-10 10:36:00,390 INFO L175 Difference]: Start difference. First operand has 293 places, 860 transitions, 18496 flow. Second operand 30 states and 336 transitions. [2024-11-10 10:36:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1350 transitions, 30891 flow [2024-11-10 10:36:02,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1350 transitions, 29953 flow, removed 406 selfloop flow, removed 9 redundant places. [2024-11-10 10:36:02,691 INFO L231 Difference]: Finished difference. Result has 325 places, 1167 transitions, 28384 flow [2024-11-10 10:36:02,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=17808, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28384, PETRI_PLACES=325, PETRI_TRANSITIONS=1167} [2024-11-10 10:36:02,693 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 298 predicate places. [2024-11-10 10:36:02,693 INFO L471 AbstractCegarLoop]: Abstraction has has 325 places, 1167 transitions, 28384 flow [2024-11-10 10:36:02,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 17 states have internal predecessors, (135), 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 10:36:02,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:02,694 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:02,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:02,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:02,895 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:02,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1879143573, now seen corresponding path program 10 times [2024-11-10 10:36:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428718770] [2024-11-10 10:36:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:03,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428718770] [2024-11-10 10:36:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428718770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647281560] [2024-11-10 10:36:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:36:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:03,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:03,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 10:36:03,067 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:36:03,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:03,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:36:03,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:03,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647281560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:03,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:03,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-10 10:36:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231200288] [2024-11-10 10:36:03,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:03,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:36:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:36:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:36:03,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:36:03,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1167 transitions, 28384 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:03,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:03,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:36:03,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:07,417 INFO L124 PetriNetUnfolderBase]: 5531/10191 cut-off events. [2024-11-10 10:36:07,417 INFO L125 PetriNetUnfolderBase]: For 345835/345835 co-relation queries the response was YES. [2024-11-10 10:36:07,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93015 conditions, 10191 events. 5531/10191 cut-off events. For 345835/345835 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 78594 event pairs, 260 based on Foata normal form. 68/10259 useless extension candidates. Maximal degree in co-relation 92900. Up to 2055 conditions per place. [2024-11-10 10:36:07,608 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 435 selfloop transitions, 1021 changer transitions 11/1470 dead transitions. [2024-11-10 10:36:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1470 transitions, 36881 flow [2024-11-10 10:36:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 10:36:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-10 10:36:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 428 transitions. [2024-11-10 10:36:07,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42842842842842843 [2024-11-10 10:36:07,610 INFO L175 Difference]: Start difference. First operand has 325 places, 1167 transitions, 28384 flow. Second operand 37 states and 428 transitions. [2024-11-10 10:36:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1470 transitions, 36881 flow [2024-11-10 10:36:11,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1470 transitions, 36597 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-11-10 10:36:11,280 INFO L231 Difference]: Finished difference. Result has 366 places, 1288 transitions, 34956 flow [2024-11-10 10:36:11,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=28089, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=34956, PETRI_PLACES=366, PETRI_TRANSITIONS=1288} [2024-11-10 10:36:11,282 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 339 predicate places. [2024-11-10 10:36:11,282 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 1288 transitions, 34956 flow [2024-11-10 10:36:11,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:36:11,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:11,283 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:11,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:11,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-10 10:36:11,484 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:11,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1024135901, now seen corresponding path program 11 times [2024-11-10 10:36:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931531629] [2024-11-10 10:36:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931531629] [2024-11-10 10:36:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931531629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:11,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428616912] [2024-11-10 10:36:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:36:11,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:11,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 10:36:11,636 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-10 10:36:11,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:11,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:36:11,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:11,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428616912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:11,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-10 10:36:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567944159] [2024-11-10 10:36:11,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:11,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:36:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:36:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:36:11,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:36:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1288 transitions, 34956 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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 10:36:11,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:11,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:36:11,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:16,894 INFO L124 PetriNetUnfolderBase]: 6309/11555 cut-off events. [2024-11-10 10:36:16,895 INFO L125 PetriNetUnfolderBase]: For 481531/481543 co-relation queries the response was YES. [2024-11-10 10:36:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113361 conditions, 11555 events. 6309/11555 cut-off events. For 481531/481543 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 89347 event pairs, 151 based on Foata normal form. 28/11583 useless extension candidates. Maximal degree in co-relation 113234. Up to 2036 conditions per place. [2024-11-10 10:36:17,082 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 658 selfloop transitions, 1063 changer transitions 21/1745 dead transitions. [2024-11-10 10:36:17,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1745 transitions, 48838 flow [2024-11-10 10:36:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:36:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:36:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 379 transitions. [2024-11-10 10:36:17,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4128540305010893 [2024-11-10 10:36:17,085 INFO L175 Difference]: Start difference. First operand has 366 places, 1288 transitions, 34956 flow. Second operand 34 states and 379 transitions. [2024-11-10 10:36:17,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1745 transitions, 48838 flow [2024-11-10 10:36:22,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1745 transitions, 48280 flow, removed 204 selfloop flow, removed 13 redundant places. [2024-11-10 10:36:22,373 INFO L231 Difference]: Finished difference. Result has 395 places, 1487 transitions, 42482 flow [2024-11-10 10:36:22,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34477, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=877, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=42482, PETRI_PLACES=395, PETRI_TRANSITIONS=1487} [2024-11-10 10:36:22,374 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 368 predicate places. [2024-11-10 10:36:22,374 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 1487 transitions, 42482 flow [2024-11-10 10:36:22,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 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 10:36:22,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:22,375 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:22,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:22,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 10:36:22,575 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:22,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 288849331, now seen corresponding path program 12 times [2024-11-10 10:36:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:22,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804988593] [2024-11-10 10:36:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804988593] [2024-11-10 10:36:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804988593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022821143] [2024-11-10 10:36:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:36:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:22,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:22,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 10:36:22,730 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:36:22,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:22,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:36:22,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:22,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:36:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022821143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:22,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:22,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-10 10:36:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654633421] [2024-11-10 10:36:22,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:22,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:36:22,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:36:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:36:22,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:36:22,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1487 transitions, 42482 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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 10:36:22,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:22,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:36:22,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:28,226 INFO L124 PetriNetUnfolderBase]: 6499/11866 cut-off events. [2024-11-10 10:36:28,226 INFO L125 PetriNetUnfolderBase]: For 530574/530586 co-relation queries the response was YES. [2024-11-10 10:36:28,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123794 conditions, 11866 events. 6499/11866 cut-off events. For 530574/530586 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 90905 event pairs, 476 based on Foata normal form. 28/11893 useless extension candidates. Maximal degree in co-relation 123656. Up to 6925 conditions per place. [2024-11-10 10:36:28,393 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 777 selfloop transitions, 910 changer transitions 13/1703 dead transitions. [2024-11-10 10:36:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1703 transitions, 51343 flow [2024-11-10 10:36:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 10:36:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-10 10:36:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 237 transitions. [2024-11-10 10:36:28,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-11-10 10:36:28,395 INFO L175 Difference]: Start difference. First operand has 395 places, 1487 transitions, 42482 flow. Second operand 22 states and 237 transitions. [2024-11-10 10:36:28,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1703 transitions, 51343 flow [2024-11-10 10:36:34,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1703 transitions, 50195 flow, removed 222 selfloop flow, removed 12 redundant places. [2024-11-10 10:36:34,649 INFO L231 Difference]: Finished difference. Result has 412 places, 1618 transitions, 48186 flow [2024-11-10 10:36:34,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=41437, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48186, PETRI_PLACES=412, PETRI_TRANSITIONS=1618} [2024-11-10 10:36:34,650 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 385 predicate places. [2024-11-10 10:36:34,651 INFO L471 AbstractCegarLoop]: Abstraction has has 412 places, 1618 transitions, 48186 flow [2024-11-10 10:36:34,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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 10:36:34,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:34,651 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:34,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:34,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 10:36:34,852 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:34,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash 597612805, now seen corresponding path program 13 times [2024-11-10 10:36:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:34,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197192780] [2024-11-10 10:36:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:34,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197192780] [2024-11-10 10:36:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197192780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179795826] [2024-11-10 10:36:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:36:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:34,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:34,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 10:36:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:35,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:36:35,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:35,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179795826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:35,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:35,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-10 10:36:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418197344] [2024-11-10 10:36:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:35,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:36:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:36:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:36:35,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:36:35,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1618 transitions, 48186 flow. Second operand has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 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 10:36:35,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:35,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:36:35,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:41,747 INFO L124 PetriNetUnfolderBase]: 7101/12922 cut-off events. [2024-11-10 10:36:41,747 INFO L125 PetriNetUnfolderBase]: For 626236/626238 co-relation queries the response was YES. [2024-11-10 10:36:41,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139062 conditions, 12922 events. 7101/12922 cut-off events. For 626236/626238 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 100663 event pairs, 452 based on Foata normal form. 52/12973 useless extension candidates. Maximal degree in co-relation 138919. Up to 6775 conditions per place. [2024-11-10 10:36:41,976 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 844 selfloop transitions, 986 changer transitions 16/1849 dead transitions. [2024-11-10 10:36:41,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1849 transitions, 57492 flow [2024-11-10 10:36:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:36:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:36:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 286 transitions. [2024-11-10 10:36:41,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-11-10 10:36:41,978 INFO L175 Difference]: Start difference. First operand has 412 places, 1618 transitions, 48186 flow. Second operand 26 states and 286 transitions. [2024-11-10 10:36:41,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1849 transitions, 57492 flow [2024-11-10 10:36:49,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1849 transitions, 56557 flow, removed 134 selfloop flow, removed 9 redundant places. [2024-11-10 10:36:49,154 INFO L231 Difference]: Finished difference. Result has 440 places, 1702 transitions, 53709 flow [2024-11-10 10:36:49,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=47297, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=53709, PETRI_PLACES=440, PETRI_TRANSITIONS=1702} [2024-11-10 10:36:49,156 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 413 predicate places. [2024-11-10 10:36:49,156 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1702 transitions, 53709 flow [2024-11-10 10:36:49,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.333333333333333) internal successors, (154), 21 states have internal predecessors, (154), 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 10:36:49,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:49,157 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:49,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 10:36:49,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 10:36:49,362 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:49,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2142098309, now seen corresponding path program 14 times [2024-11-10 10:36:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:49,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446424701] [2024-11-10 10:36:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446424701] [2024-11-10 10:36:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446424701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234994081] [2024-11-10 10:36:49,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:36:49,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:49,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:49,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:49,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 10:36:49,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:36:49,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:49,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:36:49,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:49,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:49,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234994081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:49,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:49,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-10 10:36:49,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079436484] [2024-11-10 10:36:49,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:49,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:36:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:36:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:36:49,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-10 10:36:49,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1702 transitions, 53709 flow. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 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 10:36:49,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:49,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-10 10:36:49,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:57,227 INFO L124 PetriNetUnfolderBase]: 7624/13833 cut-off events. [2024-11-10 10:36:57,228 INFO L125 PetriNetUnfolderBase]: For 772542/772544 co-relation queries the response was YES. [2024-11-10 10:36:57,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158630 conditions, 13833 events. 7624/13833 cut-off events. For 772542/772544 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 108657 event pairs, 419 based on Foata normal form. 89/13921 useless extension candidates. Maximal degree in co-relation 158476. Up to 5637 conditions per place. [2024-11-10 10:36:57,474 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 736 selfloop transitions, 1206 changer transitions 12/1957 dead transitions. [2024-11-10 10:36:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1957 transitions, 64006 flow [2024-11-10 10:36:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:36:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:36:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 289 transitions. [2024-11-10 10:36:57,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4116809116809117 [2024-11-10 10:36:57,477 INFO L175 Difference]: Start difference. First operand has 440 places, 1702 transitions, 53709 flow. Second operand 26 states and 289 transitions. [2024-11-10 10:36:57,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1957 transitions, 64006 flow