./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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-bad-threaded-sum-2.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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:28:26,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:28:27,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:28:27,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:28:27,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:28:27,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:28:27,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:28:27,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:28:27,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:28:27,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:28:27,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:28:27,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:28:27,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:28:27,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:28:27,101 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:28:27,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:28:27,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:28:27,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:28:27,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:28:27,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:28:27,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:28:27,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:28:27,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:28:27,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:28:27,106 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:28:27,106 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:28:27,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:28:27,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:28:27,107 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:28:27,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:28:27,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:28:27,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:28:27,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:27,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:28:27,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:28:27,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:28:27,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:28:27,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:28:27,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:28:27,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:28:27,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:28:27,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:28:27,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-11-16 19:28:27,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:28:27,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:28:27,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:28:27,369 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:28:27,370 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:28:27,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-16 19:28:28,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:28:29,025 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:28:29,026 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-16 19:28:29,038 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7483f138/4bed0038cb7e42c8982af49279973443/FLAG9ead343c8 [2024-11-16 19:28:29,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7483f138/4bed0038cb7e42c8982af49279973443 [2024-11-16 19:28:29,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:28:29,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:28:29,063 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:29,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:28:29,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:28:29,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28838780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29, skipping insertion in model container [2024-11-16 19:28:29,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,097 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:28:29,318 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-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-16 19:28:29,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:29,336 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:28:29,399 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-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-16 19:28:29,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:29,464 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:28:29,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29 WrapperNode [2024-11-16 19:28:29,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:29,471 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:29,471 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:28:29,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:28:29,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,508 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2024-11-16 19:28:29,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:29,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:28:29,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:28:29,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:28:29,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,541 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]. [2024-11-16 19:28:29,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,546 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:28:29,560 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:28:29,560 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:28:29,563 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:28:29,564 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (1/1) ... [2024-11-16 19:28:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:29,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:29,597 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) [2024-11-16 19:28:29,599 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 [2024-11-16 19:28:29,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:28:29,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:28:29,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:28:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:28:29,643 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:28:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:28:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:28:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:28:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:28:29,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:28:29,647 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:28:29,734 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:28:29,736 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:28:29,920 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:28:29,921 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:28:30,040 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:28:30,041 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:28:30,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:30 BoogieIcfgContainer [2024-11-16 19:28:30,041 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:28:30,043 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:28:30,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:28:30,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:28:30,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:28:29" (1/3) ... [2024-11-16 19:28:30,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2845cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:30, skipping insertion in model container [2024-11-16 19:28:30,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:29" (2/3) ... [2024-11-16 19:28:30,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2845cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:30, skipping insertion in model container [2024-11-16 19:28:30,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:30" (3/3) ... [2024-11-16 19:28:30,051 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-11-16 19:28:30,067 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:28:30,068 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:28:30,068 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:28:30,115 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:28:30,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 76 flow [2024-11-16 19:28:30,187 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-11-16 19:28:30,188 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:28:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 4/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-16 19:28:30,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 76 flow [2024-11-16 19:28:30,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 68 flow [2024-11-16 19:28:30,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:28:30,218 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;@1d57ee57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:28:30,221 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:28:30,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:28:30,231 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-16 19:28:30,231 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:28:30,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:30,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:30,232 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:30,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash 52165991, now seen corresponding path program 1 times [2024-11-16 19:28:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210514120] [2024-11-16 19:28:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210514120] [2024-11-16 19:28:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210514120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:30,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:30,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:28:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593999432] [2024-11-16 19:28:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:30,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:28:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:28:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:28:30,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-11-16 19:28:30,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2024-11-16 19:28:30,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:30,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-11-16 19:28:30,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:30,625 INFO L124 PetriNetUnfolderBase]: 74/151 cut-off events. [2024-11-16 19:28:30,627 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-16 19:28:30,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 151 events. 74/151 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 590 event pairs, 53 based on Foata normal form. 21/153 useless extension candidates. Maximal degree in co-relation 260. Up to 131 conditions per place. [2024-11-16 19:28:30,632 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 17 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-11-16 19:28:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 98 flow [2024-11-16 19:28:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:28:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:28:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2024-11-16 19:28:30,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-11-16 19:28:30,647 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 2 states and 41 transitions. [2024-11-16 19:28:30,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 98 flow [2024-11-16 19:28:30,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:28:30,653 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 56 flow [2024-11-16 19:28:30,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2024-11-16 19:28:30,659 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-16 19:28:30,660 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 56 flow [2024-11-16 19:28:30,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2024-11-16 19:28:30,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:30,661 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:30,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:28:30,661 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:30,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash 557729438, now seen corresponding path program 1 times [2024-11-16 19:28:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204417063] [2024-11-16 19:28:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204417063] [2024-11-16 19:28:31,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204417063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:31,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:31,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:31,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282219989] [2024-11-16 19:28:31,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:31,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:31,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-16 19:28:31,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-16 19:28:31,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:31,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-16 19:28:31,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:31,222 INFO L124 PetriNetUnfolderBase]: 137/291 cut-off events. [2024-11-16 19:28:31,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:28:31,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 291 events. 137/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1240 event pairs, 11 based on Foata normal form. 16/300 useless extension candidates. Maximal degree in co-relation 536. Up to 163 conditions per place. [2024-11-16 19:28:31,226 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 36 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-11-16 19:28:31,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 50 transitions, 191 flow [2024-11-16 19:28:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-16 19:28:31,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6064516129032258 [2024-11-16 19:28:31,229 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 56 flow. Second operand 5 states and 94 transitions. [2024-11-16 19:28:31,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 50 transitions, 191 flow [2024-11-16 19:28:31,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:28:31,233 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 101 flow [2024-11-16 19:28:31,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-16 19:28:31,234 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-11-16 19:28:31,234 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 101 flow [2024-11-16 19:28:31,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-16 19:28:31,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:31,234 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, 1, 1] [2024-11-16 19:28:31,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:28:31,235 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:31,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1575135394, now seen corresponding path program 1 times [2024-11-16 19:28:31,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319826938] [2024-11-16 19:28:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:31,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319826938] [2024-11-16 19:28:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319826938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:31,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811055332] [2024-11-16 19:28:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:31,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:31,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-16 19:28:31,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-16 19:28:31,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:31,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-16 19:28:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:31,618 INFO L124 PetriNetUnfolderBase]: 169/367 cut-off events. [2024-11-16 19:28:31,620 INFO L125 PetriNetUnfolderBase]: For 193/201 co-relation queries the response was YES. [2024-11-16 19:28:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 367 events. 169/367 cut-off events. For 193/201 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1726 event pairs, 17 based on Foata normal form. 13/374 useless extension candidates. Maximal degree in co-relation 859. Up to 178 conditions per place. [2024-11-16 19:28:31,628 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 37 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2024-11-16 19:28:31,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 245 flow [2024-11-16 19:28:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:28:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:28:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-16 19:28:31,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-11-16 19:28:31,632 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 101 flow. Second operand 4 states and 73 transitions. [2024-11-16 19:28:31,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 245 flow [2024-11-16 19:28:31,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:31,635 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 112 flow [2024-11-16 19:28:31,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-16 19:28:31,638 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-11-16 19:28:31,639 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 112 flow [2024-11-16 19:28:31,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-16 19:28:31,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:31,640 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, 1, 1, 1] [2024-11-16 19:28:31,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:28:31,640 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:31,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 373769913, now seen corresponding path program 1 times [2024-11-16 19:28:31,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:31,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37631089] [2024-11-16 19:28:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:31,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37631089] [2024-11-16 19:28:31,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37631089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:31,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:31,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824595292] [2024-11-16 19:28:31,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:31,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:31,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-16 19:28:31,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:31,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:31,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-16 19:28:31,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:31,929 INFO L124 PetriNetUnfolderBase]: 168/372 cut-off events. [2024-11-16 19:28:31,929 INFO L125 PetriNetUnfolderBase]: For 271/277 co-relation queries the response was YES. [2024-11-16 19:28:31,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 372 events. 168/372 cut-off events. For 271/277 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1742 event pairs, 29 based on Foata normal form. 20/385 useless extension candidates. Maximal degree in co-relation 912. Up to 129 conditions per place. [2024-11-16 19:28:31,932 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 35 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-16 19:28:31,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 261 flow [2024-11-16 19:28:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-16 19:28:31,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5741935483870968 [2024-11-16 19:28:31,934 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 112 flow. Second operand 5 states and 89 transitions. [2024-11-16 19:28:31,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 261 flow [2024-11-16 19:28:31,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:28:31,936 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 158 flow [2024-11-16 19:28:31,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-16 19:28:31,937 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-11-16 19:28:31,937 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 158 flow [2024-11-16 19:28:31,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:31,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:31,938 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, 1, 1, 1] [2024-11-16 19:28:31,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:28:31,938 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:31,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1313463045, now seen corresponding path program 2 times [2024-11-16 19:28:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:31,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398546625] [2024-11-16 19:28:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398546625] [2024-11-16 19:28:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398546625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020118043] [2024-11-16 19:28:32,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:28:32,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:32,485 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) [2024-11-16 19:28:32,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:28:32,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:28:32,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:32,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 19:28:32,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:41,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020118043] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:41,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:28:41,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 18 [2024-11-16 19:28:41,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991049984] [2024-11-16 19:28:41,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:41,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:28:41,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:28:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=252, Unknown=2, NotChecked=0, Total=342 [2024-11-16 19:28:41,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-16 19:28:41,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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) [2024-11-16 19:28:41,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:41,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-16 19:28:41,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:42,558 INFO L124 PetriNetUnfolderBase]: 757/1366 cut-off events. [2024-11-16 19:28:42,558 INFO L125 PetriNetUnfolderBase]: For 1376/1376 co-relation queries the response was YES. [2024-11-16 19:28:42,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 1366 events. 757/1366 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7047 event pairs, 32 based on Foata normal form. 1/1366 useless extension candidates. Maximal degree in co-relation 3801. Up to 308 conditions per place. [2024-11-16 19:28:42,568 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 100 selfloop transitions, 42 changer transitions 14/161 dead transitions. [2024-11-16 19:28:42,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 161 transitions, 972 flow [2024-11-16 19:28:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:28:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:28:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 250 transitions. [2024-11-16 19:28:42,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040322580645161 [2024-11-16 19:28:42,572 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 158 flow. Second operand 16 states and 250 transitions. [2024-11-16 19:28:42,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 161 transitions, 972 flow [2024-11-16 19:28:42,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 161 transitions, 958 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:42,583 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 529 flow [2024-11-16 19:28:42,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=529, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-11-16 19:28:42,584 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-11-16 19:28:42,584 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 529 flow [2024-11-16 19:28:42,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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) [2024-11-16 19:28:42,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:42,584 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, 1, 1, 1, 1] [2024-11-16 19:28:42,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:28:42,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:42,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:42,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:42,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1345224073, now seen corresponding path program 1 times [2024-11-16 19:28:42,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:42,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359007255] [2024-11-16 19:28:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:43,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359007255] [2024-11-16 19:28:43,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359007255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184329781] [2024-11-16 19:28:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:43,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:43,541 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) [2024-11-16 19:28:43,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:28:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:43,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:28:43,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:44,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:45,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184329781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:45,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:45,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-16 19:28:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029115275] [2024-11-16 19:28:45,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:45,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 19:28:45,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 19:28:45,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-16 19:28:45,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-16 19:28:45,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 529 flow. Second operand has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-11-16 19:28:45,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:45,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-16 19:28:45,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:51,021 INFO L124 PetriNetUnfolderBase]: 2328/4241 cut-off events. [2024-11-16 19:28:51,022 INFO L125 PetriNetUnfolderBase]: For 17179/17179 co-relation queries the response was YES. [2024-11-16 19:28:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15763 conditions, 4241 events. 2328/4241 cut-off events. For 17179/17179 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27615 event pairs, 65 based on Foata normal form. 12/4253 useless extension candidates. Maximal degree in co-relation 15742. Up to 777 conditions per place. [2024-11-16 19:28:51,058 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 241 selfloop transitions, 173 changer transitions 137/556 dead transitions. [2024-11-16 19:28:51,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 556 transitions, 4607 flow [2024-11-16 19:28:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-16 19:28:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-16 19:28:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 834 transitions. [2024-11-16 19:28:51,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-11-16 19:28:51,064 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 529 flow. Second operand 60 states and 834 transitions. [2024-11-16 19:28:51,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 556 transitions, 4607 flow [2024-11-16 19:28:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 556 transitions, 4306 flow, removed 146 selfloop flow, removed 3 redundant places. [2024-11-16 19:28:51,121 INFO L231 Difference]: Finished difference. Result has 161 places, 237 transitions, 2518 flow [2024-11-16 19:28:51,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=2518, PETRI_PLACES=161, PETRI_TRANSITIONS=237} [2024-11-16 19:28:51,124 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2024-11-16 19:28:51,125 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 237 transitions, 2518 flow [2024-11-16 19:28:51,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-11-16 19:28:51,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:51,125 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, 1] [2024-11-16 19:28:51,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:28:51,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-16 19:28:51,326 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:51,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -233835330, now seen corresponding path program 3 times [2024-11-16 19:28:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178589715] [2024-11-16 19:28:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:51,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178589715] [2024-11-16 19:28:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178589715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:51,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:28:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553391077] [2024-11-16 19:28:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:51,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:28:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:28:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:28:51,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-16 19:28:51,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 237 transitions, 2518 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:51,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:51,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-16 19:28:51,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:52,156 INFO L124 PetriNetUnfolderBase]: 1731/3488 cut-off events. [2024-11-16 19:28:52,156 INFO L125 PetriNetUnfolderBase]: For 44140/44366 co-relation queries the response was YES. [2024-11-16 19:28:52,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15318 conditions, 3488 events. 1731/3488 cut-off events. For 44140/44366 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23806 event pairs, 44 based on Foata normal form. 68/3548 useless extension candidates. Maximal degree in co-relation 15260. Up to 723 conditions per place. [2024-11-16 19:28:52,275 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 263 selfloop transitions, 127 changer transitions 0/451 dead transitions. [2024-11-16 19:28:52,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 451 transitions, 5597 flow [2024-11-16 19:28:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:28:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:28:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-11-16 19:28:52,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2024-11-16 19:28:52,280 INFO L175 Difference]: Start difference. First operand has 161 places, 237 transitions, 2518 flow. Second operand 9 states and 141 transitions. [2024-11-16 19:28:52,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 451 transitions, 5597 flow [2024-11-16 19:28:52,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 451 transitions, 5253 flow, removed 165 selfloop flow, removed 13 redundant places. [2024-11-16 19:28:52,421 INFO L231 Difference]: Finished difference. Result has 143 places, 309 transitions, 3679 flow [2024-11-16 19:28:52,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3679, PETRI_PLACES=143, PETRI_TRANSITIONS=309} [2024-11-16 19:28:52,423 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-11-16 19:28:52,423 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 309 transitions, 3679 flow [2024-11-16 19:28:52,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:52,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:52,423 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, 1, 1, 1, 1] [2024-11-16 19:28:52,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:28:52,423 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:28:52,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash -868000851, now seen corresponding path program 2 times [2024-11-16 19:28:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048774897] [2024-11-16 19:28:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:57,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048774897] [2024-11-16 19:28:57,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048774897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:57,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752662325] [2024-11-16 19:28:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:28:57,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:57,557 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) [2024-11-16 19:28:57,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:28:57,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:28:57,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:57,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 19:28:57,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:05,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752662325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:09,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:09,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2024-11-16 19:29:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118833155] [2024-11-16 19:29:09,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:09,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 19:29:09,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 19:29:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=517, Unknown=2, NotChecked=0, Total=650 [2024-11-16 19:29:13,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:29:13,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-16 19:29:13,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 309 transitions, 3679 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 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) [2024-11-16 19:29:13,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:13,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-16 19:29:13,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:27,567 INFO L124 PetriNetUnfolderBase]: 4526/8262 cut-off events. [2024-11-16 19:29:27,567 INFO L125 PetriNetUnfolderBase]: For 118675/118675 co-relation queries the response was YES. [2024-11-16 19:29:27,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42607 conditions, 8262 events. 4526/8262 cut-off events. For 118675/118675 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 59178 event pairs, 74 based on Foata normal form. 10/8272 useless extension candidates. Maximal degree in co-relation 42553. Up to 2430 conditions per place. [2024-11-16 19:29:27,736 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 552 selfloop transitions, 344 changer transitions 98/999 dead transitions. [2024-11-16 19:29:27,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 999 transitions, 12502 flow [2024-11-16 19:29:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-16 19:29:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-11-16 19:29:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 924 transitions. [2024-11-16 19:29:27,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-16 19:29:27,740 INFO L175 Difference]: Start difference. First operand has 143 places, 309 transitions, 3679 flow. Second operand 66 states and 924 transitions. [2024-11-16 19:29:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 999 transitions, 12502 flow [2024-11-16 19:29:28,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 999 transitions, 12443 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:28,107 INFO L231 Difference]: Finished difference. Result has 238 places, 589 transitions, 8625 flow [2024-11-16 19:29:28,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=8625, PETRI_PLACES=238, PETRI_TRANSITIONS=589} [2024-11-16 19:29:28,108 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-11-16 19:29:28,109 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 589 transitions, 8625 flow [2024-11-16 19:29:28,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 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) [2024-11-16 19:29:28,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:28,109 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, 1, 1, 1, 1] [2024-11-16 19:29:28,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:28,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:28,310 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:28,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1012593361, now seen corresponding path program 3 times [2024-11-16 19:29:28,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:28,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099735309] [2024-11-16 19:29:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:28,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:29,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:29,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099735309] [2024-11-16 19:29:29,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099735309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:29,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807977163] [2024-11-16 19:29:29,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:29,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:29,518 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) [2024-11-16 19:29:29,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:29:29,593 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:29:29,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:29,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 19:29:29,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:30,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:35,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807977163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:35,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:35,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-16 19:29:35,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061577806] [2024-11-16 19:29:35,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:35,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 19:29:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 19:29:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2024-11-16 19:29:35,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-16 19:29:35,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 589 transitions, 8625 flow. Second operand has 22 states, 22 states have (on average 11.818181818181818) internal successors, (260), 22 states have internal predecessors, (260), 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) [2024-11-16 19:29:35,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:35,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-16 19:29:35,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:49,174 INFO L124 PetriNetUnfolderBase]: 4703/9244 cut-off events. [2024-11-16 19:29:49,175 INFO L125 PetriNetUnfolderBase]: For 147070/147897 co-relation queries the response was YES. [2024-11-16 19:29:49,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55254 conditions, 9244 events. 4703/9244 cut-off events. For 147070/147897 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 74167 event pairs, 161 based on Foata normal form. 377/9590 useless extension candidates. Maximal degree in co-relation 55169. Up to 3286 conditions per place. [2024-11-16 19:29:49,260 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 498 selfloop transitions, 410 changer transitions 58/1008 dead transitions. [2024-11-16 19:29:49,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1008 transitions, 16257 flow [2024-11-16 19:29:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-16 19:29:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-16 19:29:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 610 transitions. [2024-11-16 19:29:49,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47993705743509046 [2024-11-16 19:29:49,262 INFO L175 Difference]: Start difference. First operand has 238 places, 589 transitions, 8625 flow. Second operand 41 states and 610 transitions. [2024-11-16 19:29:49,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1008 transitions, 16257 flow [2024-11-16 19:29:50,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1008 transitions, 15501 flow, removed 365 selfloop flow, removed 16 redundant places. [2024-11-16 19:29:50,094 INFO L231 Difference]: Finished difference. Result has 276 places, 793 transitions, 12781 flow [2024-11-16 19:29:50,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12781, PETRI_PLACES=276, PETRI_TRANSITIONS=793} [2024-11-16 19:29:50,096 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2024-11-16 19:29:50,096 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 793 transitions, 12781 flow [2024-11-16 19:29:50,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.818181818181818) internal successors, (260), 22 states have internal predecessors, (260), 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) [2024-11-16 19:29:50,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:50,097 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:50,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:29:50,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:50,297 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:50,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1651522775, now seen corresponding path program 4 times [2024-11-16 19:29:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468129728] [2024-11-16 19:29:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:51,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:51,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468129728] [2024-11-16 19:29:51,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468129728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:51,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682414504] [2024-11-16 19:29:51,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:51,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:51,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:51,113 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) [2024-11-16 19:29:51,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:29:51,235 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:51,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:51,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 19:29:51,238 INFO L278 TraceCheckSpWp]: Computing forward predicates...