./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:34:57,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:34:57,996 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:34:58,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:34:58,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:34:58,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:34:58,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:34:58,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:34:58,041 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:34:58,041 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:34:58,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:34:58,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:34:58,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:34:58,043 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:34:58,043 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:34:58,044 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:34:58,044 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:34:58,045 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:34:58,045 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:34:58,045 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:34:58,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:34:58,046 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:34:58,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:34:58,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:34:58,047 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:34:58,048 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:34:58,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:34:58,048 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:34:58,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:34:58,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:34:58,049 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:34:58,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:34:58,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:34:58,051 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:34:58,051 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:34:58,051 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:34:58,051 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:34:58,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:34:58,060 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:34:58,061 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:34:58,061 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:34:58,061 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:34:58,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-10-24 12:34:58,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:34:58,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:34:58,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:34:58,339 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:34:58,339 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:34:58,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-24 12:34:59,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:34:59,996 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:34:59,997 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-24 12:35:00,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54b22ef4/4d679d69dc6e40699c4d435f83c552ea/FLAGb4eb368b8 [2024-10-24 12:35:00,375 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54b22ef4/4d679d69dc6e40699c4d435f83c552ea [2024-10-24 12:35:00,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:35:00,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:35:00,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:35:00,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:35:00,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:35:00,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121f0cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00, skipping insertion in model container [2024-10-24 12:35:00,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,415 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:35:00,628 WARN L248 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-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-24 12:35:00,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:35:00,643 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:35:00,662 WARN L248 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-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-24 12:35:00,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:35:00,689 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:35:00,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00 WrapperNode [2024-10-24 12:35:00,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:35:00,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:35:00,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:35:00,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:35:00,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,721 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-10-24 12:35:00,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:35:00,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:35:00,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:35:00,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:35:00,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,736 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,748 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]. [2024-10-24 12:35:00,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,760 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:35:00,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:35:00,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:35:00,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:35:00,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (1/1) ... [2024-10-24 12:35:00,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:35:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:00,805 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) [2024-10-24 12:35:00,812 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 [2024-10-24 12:35:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:35:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:35:00,858 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:35:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:35:00,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:35:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:35:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:35:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:35:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:35:00,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:35:00,861 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:35:00,944 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:35:00,946 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:35:01,084 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:35:01,084 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:35:01,236 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:35:01,236 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 12:35:01,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:01 BoogieIcfgContainer [2024-10-24 12:35:01,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:35:01,239 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:35:01,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:35:01,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:35:01,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:35:00" (1/3) ... [2024-10-24 12:35:01,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4469d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:01, skipping insertion in model container [2024-10-24 12:35:01,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:00" (2/3) ... [2024-10-24 12:35:01,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4469d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:01, skipping insertion in model container [2024-10-24 12:35:01,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:01" (3/3) ... [2024-10-24 12:35:01,244 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-24 12:35:01,260 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:35:01,262 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:35:01,262 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:35:01,314 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:35:01,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-24 12:35:01,370 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-24 12:35:01,373 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:35:01,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-24 12:35:01,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-24 12:35:01,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-24 12:35:01,389 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:35:01,395 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;@2767baa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:35:01,396 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:35:01,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:35:01,404 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-24 12:35:01,404 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:35:01,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:01,405 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:01,408 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:01,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-10-24 12:35:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970087515] [2024-10-24 12:35:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:01,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970087515] [2024-10-24 12:35:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970087515] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:01,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:01,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:35:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815519862] [2024-10-24 12:35:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:01,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:35:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:35:01,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:35:01,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-24 12:35:01,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-24 12:35:01,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:01,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-24 12:35:01,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:01,930 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-10-24 12:35:01,930 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-24 12:35:01,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 410 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-10-24 12:35:01,934 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-24 12:35:01,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-10-24 12:35:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:35:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:35:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-24 12:35:01,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-10-24 12:35:01,949 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-10-24 12:35:01,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-10-24 12:35:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:35:01,954 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-10-24 12:35:01,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-10-24 12:35:01,960 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-10-24 12:35:01,960 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-10-24 12:35:01,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-24 12:35:01,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:01,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:01,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:35:01,962 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:01,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-10-24 12:35:01,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:01,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927856919] [2024-10-24 12:35:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:35:02,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927856919] [2024-10-24 12:35:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927856919] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:35:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:35:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:35:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504628972] [2024-10-24 12:35:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:35:02,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:35:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:35:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:35:02,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:02,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:02,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:02,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:02,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:02,313 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-10-24 12:35:02,314 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 12:35:02,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-10-24 12:35:02,319 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-24 12:35:02,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-10-24 12:35:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:35:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:35:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-10-24 12:35:02,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-10-24 12:35:02,321 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-10-24 12:35:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-10-24 12:35:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:35:02,323 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-24 12:35:02,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-24 12:35:02,323 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-24 12:35:02,324 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-24 12:35:02,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:02,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:02,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:02,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:35:02,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:02,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-10-24 12:35:02,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633716238] [2024-10-24 12:35:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:02,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633716238] [2024-10-24 12:35:02,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633716238] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578308758] [2024-10-24 12:35:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:02,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:02,718 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) [2024-10-24 12:35:02,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:35:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:02,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 12:35:02,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:03,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:03,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578308758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:03,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:03,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-10-24 12:35:03,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924138226] [2024-10-24 12:35:03,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:03,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:35:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:03,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:35:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:35:03,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:35:03,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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) [2024-10-24 12:35:03,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:35:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:04,274 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-10-24 12:35:04,275 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-10-24 12:35:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4177 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-10-24 12:35:04,285 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-10-24 12:35:04,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-10-24 12:35:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 12:35:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-24 12:35:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-10-24 12:35:04,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-10-24 12:35:04,291 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-10-24 12:35:04,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-10-24 12:35:04,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-24 12:35:04,295 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-10-24 12:35:04,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-10-24 12:35:04,296 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-10-24 12:35:04,296 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-10-24 12:35:04,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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) [2024-10-24 12:35:04,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:04,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:04,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:04,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:04,498 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:04,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash -987841917, now seen corresponding path program 2 times [2024-10-24 12:35:04,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:04,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809372368] [2024-10-24 12:35:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:04,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809372368] [2024-10-24 12:35:04,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809372368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196411969] [2024-10-24 12:35:04,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:35:04,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:04,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:04,617 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) [2024-10-24 12:35:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:35:04,681 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:04,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:04,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 12:35:04,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:04,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196411969] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:05,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8] total 14 [2024-10-24 12:35:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748294345] [2024-10-24 12:35:05,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:05,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:35:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:35:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:35:05,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:35:05,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:05,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:05,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:35:05,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:05,731 INFO L124 PetriNetUnfolderBase]: 814/1407 cut-off events. [2024-10-24 12:35:05,732 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2024-10-24 12:35:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1407 events. 814/1407 cut-off events. For 3056/3056 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6686 event pairs, 0 based on Foata normal form. 30/1437 useless extension candidates. Maximal degree in co-relation 4629. Up to 358 conditions per place. [2024-10-24 12:35:05,743 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 114 selfloop transitions, 145 changer transitions 15/275 dead transitions. [2024-10-24 12:35:05,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 275 transitions, 2256 flow [2024-10-24 12:35:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 12:35:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-24 12:35:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2024-10-24 12:35:05,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2024-10-24 12:35:05,746 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 19 states and 164 transitions. [2024-10-24 12:35:05,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 275 transitions, 2256 flow [2024-10-24 12:35:05,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 275 transitions, 2119 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-10-24 12:35:05,767 INFO L231 Difference]: Finished difference. Result has 83 places, 202 transitions, 1877 flow [2024-10-24 12:35:05,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1877, PETRI_PLACES=83, PETRI_TRANSITIONS=202} [2024-10-24 12:35:05,769 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 60 predicate places. [2024-10-24 12:35:05,769 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 202 transitions, 1877 flow [2024-10-24 12:35:05,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:35:05,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:05,769 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:05,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:35:05,970 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,SelfDestructingSolverStorable3 [2024-10-24 12:35:05,971 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:05,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 3 times [2024-10-24 12:35:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:05,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247340606] [2024-10-24 12:35:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:05,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247340606] [2024-10-24 12:35:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247340606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085939757] [2024-10-24 12:35:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:35:06,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:06,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:06,154 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) [2024-10-24 12:35:06,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:35:06,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 12:35:06,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:06,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:06,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:06,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085939757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:06,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-24 12:35:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338683485] [2024-10-24 12:35:06,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:06,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:35:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:35:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:35:06,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 202 transitions, 1877 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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) [2024-10-24 12:35:06,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:07,124 INFO L124 PetriNetUnfolderBase]: 1072/1906 cut-off events. [2024-10-24 12:35:07,124 INFO L125 PetriNetUnfolderBase]: For 11722/11732 co-relation queries the response was YES. [2024-10-24 12:35:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1906 events. 1072/1906 cut-off events. For 11722/11732 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10311 event pairs, 102 based on Foata normal form. 18/1922 useless extension candidates. Maximal degree in co-relation 7811. Up to 602 conditions per place. [2024-10-24 12:35:07,145 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 132 selfloop transitions, 186 changer transitions 23/375 dead transitions. [2024-10-24 12:35:07,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 375 transitions, 4182 flow [2024-10-24 12:35:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 12:35:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 12:35:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-10-24 12:35:07,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-10-24 12:35:07,147 INFO L175 Difference]: Start difference. First operand has 83 places, 202 transitions, 1877 flow. Second operand 16 states and 156 transitions. [2024-10-24 12:35:07,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 375 transitions, 4182 flow [2024-10-24 12:35:07,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 375 transitions, 4095 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-10-24 12:35:07,202 INFO L231 Difference]: Finished difference. Result has 106 places, 304 transitions, 3747 flow [2024-10-24 12:35:07,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3747, PETRI_PLACES=106, PETRI_TRANSITIONS=304} [2024-10-24 12:35:07,204 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-10-24 12:35:07,204 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 304 transitions, 3747 flow [2024-10-24 12:35:07,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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) [2024-10-24 12:35:07,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:07,204 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:07,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:35:07,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:07,409 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:07,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1733481921, now seen corresponding path program 4 times [2024-10-24 12:35:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068400896] [2024-10-24 12:35:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:07,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068400896] [2024-10-24 12:35:07,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068400896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160298670] [2024-10-24 12:35:07,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:35:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:07,653 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) [2024-10-24 12:35:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:35:07,707 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:35:07,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:07,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:07,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:07,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160298670] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:07,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-10-24 12:35:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262775817] [2024-10-24 12:35:07,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:07,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:35:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:35:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:35:08,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:35:08,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 304 transitions, 3747 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2024-10-24 12:35:08,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:08,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:35:08,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:09,383 INFO L124 PetriNetUnfolderBase]: 1541/2588 cut-off events. [2024-10-24 12:35:09,384 INFO L125 PetriNetUnfolderBase]: For 24606/24606 co-relation queries the response was YES. [2024-10-24 12:35:09,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2588 events. 1541/2588 cut-off events. For 24606/24606 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13668 event pairs, 21 based on Foata normal form. 35/2623 useless extension candidates. Maximal degree in co-relation 14554. Up to 585 conditions per place. [2024-10-24 12:35:09,416 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 225 selfloop transitions, 397 changer transitions 1/624 dead transitions. [2024-10-24 12:35:09,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 624 transitions, 8657 flow [2024-10-24 12:35:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-24 12:35:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-10-24 12:35:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 272 transitions. [2024-10-24 12:35:09,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-10-24 12:35:09,418 INFO L175 Difference]: Start difference. First operand has 106 places, 304 transitions, 3747 flow. Second operand 32 states and 272 transitions. [2024-10-24 12:35:09,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 624 transitions, 8657 flow [2024-10-24 12:35:09,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 624 transitions, 8467 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-10-24 12:35:09,553 INFO L231 Difference]: Finished difference. Result has 149 places, 504 transitions, 7521 flow [2024-10-24 12:35:09,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7521, PETRI_PLACES=149, PETRI_TRANSITIONS=504} [2024-10-24 12:35:09,554 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-10-24 12:35:09,554 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 504 transitions, 7521 flow [2024-10-24 12:35:09,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2024-10-24 12:35:09,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:09,555 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:09,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:09,757 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:09,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1329935501, now seen corresponding path program 5 times [2024-10-24 12:35:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:09,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565351243] [2024-10-24 12:35:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565351243] [2024-10-24 12:35:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565351243] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6865704] [2024-10-24 12:35:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:35:09,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:09,951 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) [2024-10-24 12:35:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:35:09,995 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:09,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:09,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:35:09,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:10,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6865704] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:10,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:10,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-10-24 12:35:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597195720] [2024-10-24 12:35:10,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:10,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:35:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:35:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:35:10,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:10,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 504 transitions, 7521 flow. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 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) [2024-10-24 12:35:10,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:10,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:10,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:13,187 INFO L124 PetriNetUnfolderBase]: 2089/3638 cut-off events. [2024-10-24 12:35:13,187 INFO L125 PetriNetUnfolderBase]: For 54698/54702 co-relation queries the response was YES. [2024-10-24 12:35:13,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25712 conditions, 3638 events. 2089/3638 cut-off events. For 54698/54702 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21747 event pairs, 31 based on Foata normal form. 74/3712 useless extension candidates. Maximal degree in co-relation 24360. Up to 821 conditions per place. [2024-10-24 12:35:13,243 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 191 selfloop transitions, 732 changer transitions 2/973 dead transitions. [2024-10-24 12:35:13,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 973 transitions, 15594 flow [2024-10-24 12:35:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-24 12:35:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-10-24 12:35:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 492 transitions. [2024-10-24 12:35:13,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-10-24 12:35:13,246 INFO L175 Difference]: Start difference. First operand has 149 places, 504 transitions, 7521 flow. Second operand 58 states and 492 transitions. [2024-10-24 12:35:13,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 973 transitions, 15594 flow [2024-10-24 12:35:13,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 973 transitions, 15244 flow, removed 164 selfloop flow, removed 6 redundant places. [2024-10-24 12:35:13,572 INFO L231 Difference]: Finished difference. Result has 211 places, 834 transitions, 14291 flow [2024-10-24 12:35:13,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7339, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=14291, PETRI_PLACES=211, PETRI_TRANSITIONS=834} [2024-10-24 12:35:13,574 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 188 predicate places. [2024-10-24 12:35:13,574 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 834 transitions, 14291 flow [2024-10-24 12:35:13,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 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) [2024-10-24 12:35:13,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:13,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:13,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:35:13,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:13,779 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:13,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 6 times [2024-10-24 12:35:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176998957] [2024-10-24 12:35:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:14,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176998957] [2024-10-24 12:35:14,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176998957] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:14,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778101104] [2024-10-24 12:35:14,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:35:14,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:14,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:14,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:35:14,097 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-24 12:35:14,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:14,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:14,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:14,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778101104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:14,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-10-24 12:35:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735258380] [2024-10-24 12:35:14,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:14,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 12:35:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 12:35:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-24 12:35:14,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:14,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 834 transitions, 14291 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-24 12:35:14,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:14,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:14,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:15,863 INFO L124 PetriNetUnfolderBase]: 2240/3874 cut-off events. [2024-10-24 12:35:15,863 INFO L125 PetriNetUnfolderBase]: For 53591/53607 co-relation queries the response was YES. [2024-10-24 12:35:15,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30104 conditions, 3874 events. 2240/3874 cut-off events. For 53591/53607 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23388 event pairs, 92 based on Foata normal form. 10/3882 useless extension candidates. Maximal degree in co-relation 28939. Up to 902 conditions per place. [2024-10-24 12:35:15,905 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 282 selfloop transitions, 620 changer transitions 4/954 dead transitions. [2024-10-24 12:35:15,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 954 transitions, 17877 flow [2024-10-24 12:35:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:35:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:35:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-10-24 12:35:15,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-10-24 12:35:15,908 INFO L175 Difference]: Start difference. First operand has 211 places, 834 transitions, 14291 flow. Second operand 20 states and 191 transitions. [2024-10-24 12:35:15,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 954 transitions, 17877 flow [2024-10-24 12:35:16,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 954 transitions, 17036 flow, removed 405 selfloop flow, removed 4 redundant places. [2024-10-24 12:35:16,438 INFO L231 Difference]: Finished difference. Result has 230 places, 903 transitions, 16874 flow [2024-10-24 12:35:16,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13493, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16874, PETRI_PLACES=230, PETRI_TRANSITIONS=903} [2024-10-24 12:35:16,439 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 207 predicate places. [2024-10-24 12:35:16,439 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 903 transitions, 16874 flow [2024-10-24 12:35:16,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-10-24 12:35:16,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:16,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:16,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 12:35:16,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:16,641 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:16,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash -769456077, now seen corresponding path program 7 times [2024-10-24 12:35:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554884075] [2024-10-24 12:35:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554884075] [2024-10-24 12:35:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554884075] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323693466] [2024-10-24 12:35:16,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:35:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:16,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:16,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:35:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:16,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:16,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:16,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:17,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323693466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:17,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-10-24 12:35:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766652794] [2024-10-24 12:35:17,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:17,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:35:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:35:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:35:17,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:35:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 903 transitions, 16874 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 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) [2024-10-24 12:35:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:35:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:19,603 INFO L124 PetriNetUnfolderBase]: 3162/5304 cut-off events. [2024-10-24 12:35:19,603 INFO L125 PetriNetUnfolderBase]: For 60503/60503 co-relation queries the response was YES. [2024-10-24 12:35:19,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43004 conditions, 5304 events. 3162/5304 cut-off events. For 60503/60503 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 32152 event pairs, 37 based on Foata normal form. 11/5315 useless extension candidates. Maximal degree in co-relation 41334. Up to 1324 conditions per place. [2024-10-24 12:35:19,663 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 402 selfloop transitions, 1007 changer transitions 0/1410 dead transitions. [2024-10-24 12:35:19,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1410 transitions, 28161 flow [2024-10-24 12:35:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-24 12:35:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-24 12:35:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 323 transitions. [2024-10-24 12:35:19,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4157014157014157 [2024-10-24 12:35:19,666 INFO L175 Difference]: Start difference. First operand has 230 places, 903 transitions, 16874 flow. Second operand 37 states and 323 transitions. [2024-10-24 12:35:19,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1410 transitions, 28161 flow [2024-10-24 12:35:20,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1410 transitions, 27912 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-10-24 12:35:20,618 INFO L231 Difference]: Finished difference. Result has 279 places, 1295 transitions, 27707 flow [2024-10-24 12:35:20,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16723, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=27707, PETRI_PLACES=279, PETRI_TRANSITIONS=1295} [2024-10-24 12:35:20,620 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 256 predicate places. [2024-10-24 12:35:20,620 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 1295 transitions, 27707 flow [2024-10-24 12:35:20,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 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) [2024-10-24 12:35:20,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:20,621 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:20,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:20,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:20,822 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:20,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1775399255, now seen corresponding path program 8 times [2024-10-24 12:35:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:20,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277087948] [2024-10-24 12:35:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:21,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277087948] [2024-10-24 12:35:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277087948] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:21,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326737965] [2024-10-24 12:35:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:35:21,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:21,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:21,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:35:21,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:35:21,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:21,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:21,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:21,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326737965] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:21,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-24 12:35:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131252868] [2024-10-24 12:35:21,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:21,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:35:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:35:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:35:21,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:21,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1295 transitions, 27707 flow. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 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) [2024-10-24 12:35:21,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:24,104 INFO L124 PetriNetUnfolderBase]: 3446/5964 cut-off events. [2024-10-24 12:35:24,104 INFO L125 PetriNetUnfolderBase]: For 105599/105601 co-relation queries the response was YES. [2024-10-24 12:35:24,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55442 conditions, 5964 events. 3446/5964 cut-off events. For 105599/105601 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39115 event pairs, 131 based on Foata normal form. 44/6008 useless extension candidates. Maximal degree in co-relation 54197. Up to 1479 conditions per place. [2024-10-24 12:35:24,162 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 356 selfloop transitions, 1211 changer transitions 0/1641 dead transitions. [2024-10-24 12:35:24,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1641 transitions, 37855 flow [2024-10-24 12:35:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:35:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:35:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-10-24 12:35:24,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-10-24 12:35:24,163 INFO L175 Difference]: Start difference. First operand has 279 places, 1295 transitions, 27707 flow. Second operand 23 states and 230 transitions. [2024-10-24 12:35:24,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1641 transitions, 37855 flow [2024-10-24 12:35:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1641 transitions, 36838 flow, removed 154 selfloop flow, removed 5 redundant places. [2024-10-24 12:35:25,760 INFO L231 Difference]: Finished difference. Result has 306 places, 1553 transitions, 37615 flow [2024-10-24 12:35:25,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26906, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=975, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=37615, PETRI_PLACES=306, PETRI_TRANSITIONS=1553} [2024-10-24 12:35:25,763 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 283 predicate places. [2024-10-24 12:35:25,763 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 1553 transitions, 37615 flow [2024-10-24 12:35:25,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 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) [2024-10-24 12:35:25,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:25,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:25,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:35:25,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 12:35:25,965 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:25,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1186924357, now seen corresponding path program 9 times [2024-10-24 12:35:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219212780] [2024-10-24 12:35:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:26,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219212780] [2024-10-24 12:35:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219212780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111072330] [2024-10-24 12:35:26,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:35:26,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:26,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:35:26,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:35:26,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:26,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:26,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:26,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111072330] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:26,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:26,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-10-24 12:35:26,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095821510] [2024-10-24 12:35:26,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:26,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:35:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:35:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:35:26,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-24 12:35:26,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1553 transitions, 37615 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 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) [2024-10-24 12:35:26,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:26,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-24 12:35:26,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:31,854 INFO L124 PetriNetUnfolderBase]: 6014/10041 cut-off events. [2024-10-24 12:35:31,854 INFO L125 PetriNetUnfolderBase]: For 187858/187858 co-relation queries the response was YES. [2024-10-24 12:35:31,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102629 conditions, 10041 events. 6014/10041 cut-off events. For 187858/187858 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 66929 event pairs, 64 based on Foata normal form. 111/10152 useless extension candidates. Maximal degree in co-relation 101246. Up to 2565 conditions per place. [2024-10-24 12:35:31,975 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 745 selfloop transitions, 2111 changer transitions 8/2865 dead transitions. [2024-10-24 12:35:31,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 2865 transitions, 74139 flow [2024-10-24 12:35:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-24 12:35:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-10-24 12:35:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-10-24 12:35:31,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-10-24 12:35:31,978 INFO L175 Difference]: Start difference. First operand has 306 places, 1553 transitions, 37615 flow. Second operand 47 states and 403 transitions. [2024-10-24 12:35:31,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 2865 transitions, 74139 flow [2024-10-24 12:35:36,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 2865 transitions, 73854 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-10-24 12:35:36,571 INFO L231 Difference]: Finished difference. Result has 373 places, 2641 transitions, 73222 flow [2024-10-24 12:35:36,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=37267, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=73222, PETRI_PLACES=373, PETRI_TRANSITIONS=2641} [2024-10-24 12:35:36,574 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 350 predicate places. [2024-10-24 12:35:36,574 INFO L471 AbstractCegarLoop]: Abstraction has has 373 places, 2641 transitions, 73222 flow [2024-10-24 12:35:36,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 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) [2024-10-24 12:35:36,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:36,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 12:35:36,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:36,779 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:36,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 233897117, now seen corresponding path program 10 times [2024-10-24 12:35:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322532657] [2024-10-24 12:35:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322532657] [2024-10-24 12:35:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322532657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346461004] [2024-10-24 12:35:36,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:35:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:36,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:36,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:35:36,963 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:35:36,963 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:36,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:36,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:37,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346461004] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:37,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-24 12:35:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107700064] [2024-10-24 12:35:37,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:37,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 12:35:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:37,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 12:35:37,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:35:37,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:37,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 2641 transitions, 73222 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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) [2024-10-24 12:35:37,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:37,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:37,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:43,548 INFO L124 PetriNetUnfolderBase]: 5667/9646 cut-off events. [2024-10-24 12:35:43,548 INFO L125 PetriNetUnfolderBase]: For 271841/271843 co-relation queries the response was YES. [2024-10-24 12:35:43,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112830 conditions, 9646 events. 5667/9646 cut-off events. For 271841/271843 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66134 event pairs, 378 based on Foata normal form. 16/9662 useless extension candidates. Maximal degree in co-relation 111801. Up to 2904 conditions per place. [2024-10-24 12:35:43,795 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 391 selfloop transitions, 2205 changer transitions 4/2731 dead transitions. [2024-10-24 12:35:43,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 2731 transitions, 79910 flow [2024-10-24 12:35:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 12:35:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-24 12:35:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-10-24 12:35:43,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-10-24 12:35:43,796 INFO L175 Difference]: Start difference. First operand has 373 places, 2641 transitions, 73222 flow. Second operand 20 states and 191 transitions. [2024-10-24 12:35:43,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 2731 transitions, 79910 flow [2024-10-24 12:35:50,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 2731 transitions, 79484 flow, removed 189 selfloop flow, removed 5 redundant places. [2024-10-24 12:35:50,205 INFO L231 Difference]: Finished difference. Result has 389 places, 2685 transitions, 80153 flow [2024-10-24 12:35:50,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=72633, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=80153, PETRI_PLACES=389, PETRI_TRANSITIONS=2685} [2024-10-24 12:35:50,208 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 366 predicate places. [2024-10-24 12:35:50,208 INFO L471 AbstractCegarLoop]: Abstraction has has 389 places, 2685 transitions, 80153 flow [2024-10-24 12:35:50,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 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) [2024-10-24 12:35:50,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:35:50,209 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:35:50,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 12:35:50,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 12:35:50,410 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:35:50,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:35:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash -983645117, now seen corresponding path program 11 times [2024-10-24 12:35:50,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:35:50,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142606689] [2024-10-24 12:35:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:35:50,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:35:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:35:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:50,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:35:50,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142606689] [2024-10-24 12:35:50,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142606689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:35:50,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519295942] [2024-10-24 12:35:50,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:35:50,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:35:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:35:50,631 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:35:50,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:35:50,685 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 12:35:50,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:35:50,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:35:50,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:35:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:50,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:35:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:35:51,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519295942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:35:51,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:35:51,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-24 12:35:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807573793] [2024-10-24 12:35:51,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:35:51,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:35:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:35:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:35:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:35:51,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:35:51,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 2685 transitions, 80153 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2024-10-24 12:35:51,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:35:51,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:35:51,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:35:57,780 INFO L124 PetriNetUnfolderBase]: 6313/10768 cut-off events. [2024-10-24 12:35:57,780 INFO L125 PetriNetUnfolderBase]: For 340276/340279 co-relation queries the response was YES. [2024-10-24 12:35:57,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134979 conditions, 10768 events. 6313/10768 cut-off events. For 340276/340279 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 75058 event pairs, 516 based on Foata normal form. 60/10827 useless extension candidates. Maximal degree in co-relation 133764. Up to 3953 conditions per place. [2024-10-24 12:35:58,136 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1309 selfloop transitions, 1686 changer transitions 0/3126 dead transitions. [2024-10-24 12:35:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 3126 transitions, 98621 flow [2024-10-24 12:35:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 12:35:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 12:35:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 197 transitions. [2024-10-24 12:35:58,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4467120181405896 [2024-10-24 12:35:58,138 INFO L175 Difference]: Start difference. First operand has 389 places, 2685 transitions, 80153 flow. Second operand 21 states and 197 transitions. [2024-10-24 12:35:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 3126 transitions, 98621 flow [2024-10-24 12:36:06,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 3126 transitions, 97930 flow, removed 80 selfloop flow, removed 13 redundant places. [2024-10-24 12:36:06,470 INFO L231 Difference]: Finished difference. Result has 412 places, 2962 transitions, 94984 flow [2024-10-24 12:36:06,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=79583, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=94984, PETRI_PLACES=412, PETRI_TRANSITIONS=2962} [2024-10-24 12:36:06,473 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2024-10-24 12:36:06,473 INFO L471 AbstractCegarLoop]: Abstraction has has 412 places, 2962 transitions, 94984 flow [2024-10-24 12:36:06,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2024-10-24 12:36:06,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:06,474 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:06,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 12:36:06,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 12:36:06,675 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:06,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1038874551, now seen corresponding path program 12 times [2024-10-24 12:36:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:06,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474872037] [2024-10-24 12:36:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:06,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474872037] [2024-10-24 12:36:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474872037] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233672568] [2024-10-24 12:36:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:06,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:06,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:06,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 12:36:06,834 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:36:06,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:06,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:36:06,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:06,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:07,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233672568] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:07,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:07,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-10-24 12:36:07,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199641238] [2024-10-24 12:36:07,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:07,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:07,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:07,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:36:07,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 2962 transitions, 94984 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 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) [2024-10-24 12:36:07,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:07,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:36:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:15,405 INFO L124 PetriNetUnfolderBase]: 6611/11277 cut-off events. [2024-10-24 12:36:15,405 INFO L125 PetriNetUnfolderBase]: For 427261/427264 co-relation queries the response was YES. [2024-10-24 12:36:15,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150901 conditions, 11277 events. 6611/11277 cut-off events. For 427261/427264 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 79234 event pairs, 1075 based on Foata normal form. 10/11284 useless extension candidates. Maximal degree in co-relation 150313. Up to 6586 conditions per place. [2024-10-24 12:36:15,618 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1488 selfloop transitions, 1579 changer transitions 3/3201 dead transitions. [2024-10-24 12:36:15,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 3201 transitions, 108335 flow [2024-10-24 12:36:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 12:36:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 12:36:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 193 transitions. [2024-10-24 12:36:15,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4376417233560091 [2024-10-24 12:36:15,620 INFO L175 Difference]: Start difference. First operand has 412 places, 2962 transitions, 94984 flow. Second operand 21 states and 193 transitions. [2024-10-24 12:36:15,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 3201 transitions, 108335 flow [2024-10-24 12:36:26,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 3201 transitions, 107403 flow, removed 358 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:26,434 INFO L231 Difference]: Finished difference. Result has 445 places, 3148 transitions, 106898 flow [2024-10-24 12:36:26,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=94198, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=106898, PETRI_PLACES=445, PETRI_TRANSITIONS=3148} [2024-10-24 12:36:26,437 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-10-24 12:36:26,437 INFO L471 AbstractCegarLoop]: Abstraction has has 445 places, 3148 transitions, 106898 flow [2024-10-24 12:36:26,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 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) [2024-10-24 12:36:26,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:26,438 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:26,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:26,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 12:36:26,639 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:36:26,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash -270037781, now seen corresponding path program 13 times [2024-10-24 12:36:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:26,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008621781] [2024-10-24 12:36:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008621781] [2024-10-24 12:36:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008621781] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847242612] [2024-10-24 12:36:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:36:26,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:26,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:26,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 12:36:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:26,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 12:36:26,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:27,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847242612] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:27,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:27,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-10-24 12:36:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661870372] [2024-10-24 12:36:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:27,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:36:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:36:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:36:27,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-24 12:36:27,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 3148 transitions, 106898 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-10-24 12:36:27,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:27,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-24 12:36:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand