./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-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-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:52:24,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:52:24,386 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:52:24,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:52:24,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:52:24,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:52:24,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:52:24,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:52:24,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:52:24,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:52:24,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:52:24,424 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:52:24,425 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:52:24,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:52:24,426 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:52:24,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:52:24,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:52:24,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:52:24,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:52:24,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:52:24,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:52:24,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:52:24,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:52:24,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:52:24,432 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:52:24,432 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:52:24,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:52:24,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:52:24,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:52:24,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:52:24,433 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:52:24,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:52:24,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:52:24,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:52:24,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:52:24,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:52:24,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:52:24,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:52:24,438 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:52:24,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:52:24,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:52:24,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:52:24,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-19 01:52:24,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:52:24,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:52:24,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:52:24,683 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:52:24,683 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:52:24,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-19 01:52:26,132 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:52:26,316 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:52:26,316 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-19 01:52:26,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd81a9fd2/b4344fbdaab24f349fc990ab0a6414b7/FLAGf6e0fed78 [2024-11-19 01:52:26,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd81a9fd2/b4344fbdaab24f349fc990ab0a6414b7 [2024-11-19 01:52:26,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:52:26,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:52:26,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:52:26,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:52:26,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:52:26,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,363 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166ff36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26, skipping insertion in model container [2024-11-19 01:52:26,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,388 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:52:26,638 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-19 01:52:26,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:52:26,651 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:52:26,672 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-19 01:52:26,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:52:26,694 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:52:26,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26 WrapperNode [2024-11-19 01:52:26,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:52:26,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:52:26,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:52:26,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:52:26,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,727 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-19 01:52:26,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:52:26,728 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:52:26,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:52:26,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:52:26,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,741 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,760 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 01:52:26,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:52:26,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:52:26,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:52:26,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:52:26,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (1/1) ... [2024-11-19 01:52:26,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:52:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:26,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:52:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:52:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:52:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:52:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:52:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:52:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:52:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:52:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:52:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:52:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:52:26,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:52:26,872 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:52:26,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:52:26,958 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:52:27,144 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:52:27,144 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:52:27,287 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:52:27,287 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:52:27,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:52:27 BoogieIcfgContainer [2024-11-19 01:52:27,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:52:27,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:52:27,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:52:27,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:52:27,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:52:26" (1/3) ... [2024-11-19 01:52:27,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54834731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:52:27, skipping insertion in model container [2024-11-19 01:52:27,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:52:26" (2/3) ... [2024-11-19 01:52:27,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54834731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:52:27, skipping insertion in model container [2024-11-19 01:52:27,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:52:27" (3/3) ... [2024-11-19 01:52:27,300 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-19 01:52:27,316 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:52:27,319 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:52:27,319 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:52:27,372 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:52:27,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-19 01:52:27,429 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-19 01:52:27,430 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:52:27,432 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. [2024-11-19 01:52:27,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-19 01:52:27,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-19 01:52:27,443 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:52:27,449 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;@1d2ad339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:52:27,449 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:52:27,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:52:27,457 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-19 01:52:27,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:52:27,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:27,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:27,459 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:27,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-11-19 01:52:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:27,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318404066] [2024-11-19 01:52:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:52:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318404066] [2024-11-19 01:52:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318404066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:52:27,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:52:27,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:52:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752614504] [2024-11-19 01:52:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:52:27,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:52:27,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:52:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:52:27,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-19 01:52:27,892 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) [2024-11-19 01:52:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-19 01:52:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:28,007 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-11-19 01:52:28,007 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-19 01:52:28,010 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. [2024-11-19 01:52:28,014 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-19 01:52:28,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-11-19 01:52:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:52:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:52:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-19 01:52:28,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-19 01:52:28,028 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-11-19 01:52:28,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-11-19 01:52:28,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:52:28,033 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-11-19 01:52:28,035 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} [2024-11-19 01:52:28,038 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-11-19 01:52:28,038 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-11-19 01:52:28,038 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) [2024-11-19 01:52:28,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:28,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:28,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:52:28,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:28,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-11-19 01:52:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578990787] [2024-11-19 01:52:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:52:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:52:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:28,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578990787] [2024-11-19 01:52:28,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578990787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:52:28,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:52:28,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:52:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177257791] [2024-11-19 01:52:28,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:52:28,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:52:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:52:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:52:28,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:28,193 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) [2024-11-19 01:52:28,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:28,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:28,305 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-11-19 01:52:28,305 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 01:52:28,307 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. [2024-11-19 01:52:28,308 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-19 01:52:28,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-11-19 01:52:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:52:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:52:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-19 01:52:28,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-19 01:52:28,310 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-11-19 01:52:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-11-19 01:52:28,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:52:28,311 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-19 01:52:28,311 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} [2024-11-19 01:52:28,312 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-19 01:52:28,313 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-19 01:52:28,313 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) [2024-11-19 01:52:28,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:28,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:28,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:52:28,314 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:28,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-11-19 01:52:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:28,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173841379] [2024-11-19 01:52:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:52:28,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:28,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:28,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173841379] [2024-11-19 01:52:28,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173841379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:28,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123427224] [2024-11-19 01:52:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:52:28,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:28,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:28,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:52:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:28,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 01:52:28,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:29,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123427224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:29,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-19 01:52:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926511587] [2024-11-19 01:52:29,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:29,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:52:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:52:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:52:29,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:52:29,467 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) [2024-11-19 01:52:29,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:29,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:52:29,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:30,136 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-11-19 01:52:30,136 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-19 01:52:30,139 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. [2024-11-19 01:52:30,147 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-11-19 01:52:30,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-11-19 01:52:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:52:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:52:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-11-19 01:52:30,153 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-11-19 01:52:30,153 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-11-19 01:52:30,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-11-19 01:52:30,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 01:52:30,159 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-11-19 01:52:30,159 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} [2024-11-19 01:52:30,160 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-11-19 01:52:30,160 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-11-19 01:52:30,161 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) [2024-11-19 01:52:30,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:30,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:30,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 01:52:30,361 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 [2024-11-19 01:52:30,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:30,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -987841917, now seen corresponding path program 2 times [2024-11-19 01:52:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675409439] [2024-11-19 01:52:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:52:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:30,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:30,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675409439] [2024-11-19 01:52:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675409439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40217997] [2024-11-19 01:52:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:52:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:30,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:30,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:52:30,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:30,556 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:30,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 01:52:30,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:30,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40217997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:30,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:30,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8] total 14 [2024-11-19 01:52:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589801459] [2024-11-19 01:52:30,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:30,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:52:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:52:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:52:31,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:52:31,014 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) [2024-11-19 01:52:31,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:31,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:52:31,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:31,664 INFO L124 PetriNetUnfolderBase]: 814/1407 cut-off events. [2024-11-19 01:52:31,665 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2024-11-19 01:52:31,669 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. [2024-11-19 01:52:31,676 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 114 selfloop transitions, 145 changer transitions 15/275 dead transitions. [2024-11-19 01:52:31,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 275 transitions, 2256 flow [2024-11-19 01:52:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:52:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:52:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2024-11-19 01:52:31,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2024-11-19 01:52:31,678 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 19 states and 164 transitions. [2024-11-19 01:52:31,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 275 transitions, 2256 flow [2024-11-19 01:52:31,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 275 transitions, 2119 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-11-19 01:52:31,703 INFO L231 Difference]: Finished difference. Result has 83 places, 202 transitions, 1877 flow [2024-11-19 01:52:31,703 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} [2024-11-19 01:52:31,705 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 60 predicate places. [2024-11-19 01:52:31,705 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 202 transitions, 1877 flow [2024-11-19 01:52:31,705 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) [2024-11-19 01:52:31,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:31,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:31,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:52:31,909 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 [2024-11-19 01:52:31,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:31,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 3 times [2024-11-19 01:52:31,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130959497] [2024-11-19 01:52:31,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:52:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:31,945 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:52:31,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:32,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:32,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130959497] [2024-11-19 01:52:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130959497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:32,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399894578] [2024-11-19 01:52:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:52:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:32,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:32,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:52:32,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:52:32,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:32,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:32,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:32,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:32,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399894578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:32,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:32,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-19 01:52:32,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360302635] [2024-11-19 01:52:32,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:32,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:52:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:52:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:52:32,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:32,511 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) [2024-11-19 01:52:32,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:32,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:32,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:33,084 INFO L124 PetriNetUnfolderBase]: 1072/1906 cut-off events. [2024-11-19 01:52:33,084 INFO L125 PetriNetUnfolderBase]: For 11722/11732 co-relation queries the response was YES. [2024-11-19 01:52:33,094 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. [2024-11-19 01:52:33,106 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 132 selfloop transitions, 186 changer transitions 23/375 dead transitions. [2024-11-19 01:52:33,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 375 transitions, 4182 flow [2024-11-19 01:52:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:52:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:52:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-11-19 01:52:33,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-19 01:52:33,109 INFO L175 Difference]: Start difference. First operand has 83 places, 202 transitions, 1877 flow. Second operand 16 states and 156 transitions. [2024-11-19 01:52:33,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 375 transitions, 4182 flow [2024-11-19 01:52:33,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 375 transitions, 4095 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-19 01:52:33,187 INFO L231 Difference]: Finished difference. Result has 106 places, 304 transitions, 3747 flow [2024-11-19 01:52:33,187 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} [2024-11-19 01:52:33,189 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-11-19 01:52:33,190 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 304 transitions, 3747 flow [2024-11-19 01:52:33,190 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) [2024-11-19 01:52:33,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:33,191 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:33,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:52:33,392 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 [2024-11-19 01:52:33,392 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1733481921, now seen corresponding path program 4 times [2024-11-19 01:52:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:33,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777159964] [2024-11-19 01:52:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:52:33,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:33,412 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:52:33,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777159964] [2024-11-19 01:52:33,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777159964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578159227] [2024-11-19 01:52:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:52:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:33,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:33,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:52:33,634 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:52:33,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:33,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:33,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:33,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578159227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:34,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-11-19 01:52:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190700861] [2024-11-19 01:52:34,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:34,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:52:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:52:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:52:34,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:52:34,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 304 transitions, 3747 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:34,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:34,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:52:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:35,285 INFO L124 PetriNetUnfolderBase]: 1466/2461 cut-off events. [2024-11-19 01:52:35,286 INFO L125 PetriNetUnfolderBase]: For 23976/23976 co-relation queries the response was YES. [2024-11-19 01:52:35,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 2461 events. 1466/2461 cut-off events. For 23976/23976 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12825 event pairs, 16 based on Foata normal form. 35/2496 useless extension candidates. Maximal degree in co-relation 13611. Up to 533 conditions per place. [2024-11-19 01:52:35,314 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 207 selfloop transitions, 394 changer transitions 1/603 dead transitions. [2024-11-19 01:52:35,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 603 transitions, 8447 flow [2024-11-19 01:52:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 01:52:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-19 01:52:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2024-11-19 01:52:35,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2024-11-19 01:52:35,318 INFO L175 Difference]: Start difference. First operand has 106 places, 304 transitions, 3747 flow. Second operand 26 states and 229 transitions. [2024-11-19 01:52:35,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 603 transitions, 8447 flow [2024-11-19 01:52:35,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 603 transitions, 8219 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-11-19 01:52:35,450 INFO L231 Difference]: Finished difference. Result has 141 places, 491 transitions, 7451 flow [2024-11-19 01:52:35,450 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=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7451, PETRI_PLACES=141, PETRI_TRANSITIONS=491} [2024-11-19 01:52:35,451 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-11-19 01:52:35,452 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 491 transitions, 7451 flow [2024-11-19 01:52:35,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:35,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:35,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:35,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:52:35,653 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 [2024-11-19 01:52:35,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:35,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1329935501, now seen corresponding path program 5 times [2024-11-19 01:52:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573423581] [2024-11-19 01:52:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:52:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:35,667 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:35,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:35,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573423581] [2024-11-19 01:52:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573423581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789565587] [2024-11-19 01:52:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:52:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:35,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:35,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:52:35,886 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:35,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:35,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:52:35,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:36,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:36,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789565587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:36,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:36,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-11-19 01:52:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51813172] [2024-11-19 01:52:36,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:36,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:52:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:52:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:52:36,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:36,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 491 transitions, 7451 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 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) [2024-11-19 01:52:36,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:36,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:36,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:38,743 INFO L124 PetriNetUnfolderBase]: 1856/3255 cut-off events. [2024-11-19 01:52:38,744 INFO L125 PetriNetUnfolderBase]: For 49641/49677 co-relation queries the response was YES. [2024-11-19 01:52:38,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23084 conditions, 3255 events. 1856/3255 cut-off events. For 49641/49677 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19017 event pairs, 31 based on Foata normal form. 54/3307 useless extension candidates. Maximal degree in co-relation 21423. Up to 737 conditions per place. [2024-11-19 01:52:38,799 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 166 selfloop transitions, 680 changer transitions 2/888 dead transitions. [2024-11-19 01:52:38,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 888 transitions, 14439 flow [2024-11-19 01:52:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-19 01:52:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-19 01:52:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 379 transitions. [2024-11-19 01:52:38,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40105820105820106 [2024-11-19 01:52:38,802 INFO L175 Difference]: Start difference. First operand has 141 places, 491 transitions, 7451 flow. Second operand 45 states and 379 transitions. [2024-11-19 01:52:38,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 888 transitions, 14439 flow [2024-11-19 01:52:39,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 888 transitions, 13952 flow, removed 241 selfloop flow, removed 2 redundant places. [2024-11-19 01:52:39,116 INFO L231 Difference]: Finished difference. Result has 191 places, 784 transitions, 13448 flow [2024-11-19 01:52:39,117 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13448, PETRI_PLACES=191, PETRI_TRANSITIONS=784} [2024-11-19 01:52:39,117 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2024-11-19 01:52:39,117 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 784 transitions, 13448 flow [2024-11-19 01:52:39,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 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) [2024-11-19 01:52:39,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:39,118 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:39,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:52:39,318 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 [2024-11-19 01:52:39,319 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:39,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1352183953, now seen corresponding path program 6 times [2024-11-19 01:52:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:39,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888182117] [2024-11-19 01:52:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:52:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:39,342 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:52:39,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:39,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888182117] [2024-11-19 01:52:39,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888182117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:39,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799944614] [2024-11-19 01:52:39,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:52:39,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:39,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:39,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:52:39,594 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:52:39,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:39,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:39,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:39,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799944614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:39,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-19 01:52:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832529419] [2024-11-19 01:52:39,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:39,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:52:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:52:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:52:39,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:52:39,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 784 transitions, 13448 flow. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:39,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:39,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:52:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:41,866 INFO L124 PetriNetUnfolderBase]: 2279/3901 cut-off events. [2024-11-19 01:52:41,866 INFO L125 PetriNetUnfolderBase]: For 49771/49771 co-relation queries the response was YES. [2024-11-19 01:52:41,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29849 conditions, 3901 events. 2279/3901 cut-off events. For 49771/49771 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22842 event pairs, 24 based on Foata normal form. 6/3907 useless extension candidates. Maximal degree in co-relation 28455. Up to 873 conditions per place. [2024-11-19 01:52:41,904 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 346 selfloop transitions, 757 changer transitions 5/1109 dead transitions. [2024-11-19 01:52:41,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1109 transitions, 20310 flow [2024-11-19 01:52:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-19 01:52:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-19 01:52:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 343 transitions. [2024-11-19 01:52:41,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-19 01:52:41,909 INFO L175 Difference]: Start difference. First operand has 191 places, 784 transitions, 13448 flow. Second operand 40 states and 343 transitions. [2024-11-19 01:52:41,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1109 transitions, 20310 flow [2024-11-19 01:52:42,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1109 transitions, 19340 flow, removed 425 selfloop flow, removed 2 redundant places. [2024-11-19 01:52:42,592 INFO L231 Difference]: Finished difference. Result has 242 places, 1010 transitions, 19200 flow [2024-11-19 01:52:42,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19200, PETRI_PLACES=242, PETRI_TRANSITIONS=1010} [2024-11-19 01:52:42,593 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 219 predicate places. [2024-11-19 01:52:42,594 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 1010 transitions, 19200 flow [2024-11-19 01:52:42,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:42,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:42,594 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:42,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 01:52:42,795 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 [2024-11-19 01:52:42,796 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:42,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 7 times [2024-11-19 01:52:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:42,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994763403] [2024-11-19 01:52:42,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:52:42,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:43,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994763403] [2024-11-19 01:52:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994763403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880736543] [2024-11-19 01:52:43,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:52:43,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:43,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:43,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:43,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:52:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:52:43,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:43,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:43,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:43,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880736543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:43,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-19 01:52:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566224998] [2024-11-19 01:52:43,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:43,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:52:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:52:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:52:43,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1010 transitions, 19200 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) [2024-11-19 01:52:43,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:45,209 INFO L124 PetriNetUnfolderBase]: 2494/4333 cut-off events. [2024-11-19 01:52:45,209 INFO L125 PetriNetUnfolderBase]: For 60200/60204 co-relation queries the response was YES. [2024-11-19 01:52:45,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36667 conditions, 4333 events. 2494/4333 cut-off events. For 60200/60204 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26967 event pairs, 119 based on Foata normal form. 22/4355 useless extension candidates. Maximal degree in co-relation 35768. Up to 994 conditions per place. [2024-11-19 01:52:45,269 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 347 selfloop transitions, 789 changer transitions 5/1213 dead transitions. [2024-11-19 01:52:45,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1213 transitions, 25110 flow [2024-11-19 01:52:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 01:52:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-19 01:52:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 202 transitions. [2024-11-19 01:52:45,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4580498866213152 [2024-11-19 01:52:45,271 INFO L175 Difference]: Start difference. First operand has 242 places, 1010 transitions, 19200 flow. Second operand 21 states and 202 transitions. [2024-11-19 01:52:45,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1213 transitions, 25110 flow [2024-11-19 01:52:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1213 transitions, 24789 flow, removed 149 selfloop flow, removed 5 redundant places. [2024-11-19 01:52:46,222 INFO L231 Difference]: Finished difference. Result has 264 places, 1153 transitions, 24423 flow [2024-11-19 01:52:46,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=18832, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24423, PETRI_PLACES=264, PETRI_TRANSITIONS=1153} [2024-11-19 01:52:46,223 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 241 predicate places. [2024-11-19 01:52:46,223 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 1153 transitions, 24423 flow [2024-11-19 01:52:46,224 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) [2024-11-19 01:52:46,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:46,224 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:46,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:52:46,424 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 [2024-11-19 01:52:46,425 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:46,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2110190859, now seen corresponding path program 8 times [2024-11-19 01:52:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:46,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546451193] [2024-11-19 01:52:46,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:52:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:46,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:46,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:46,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:46,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546451193] [2024-11-19 01:52:46,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546451193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:46,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877082061] [2024-11-19 01:52:46,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:52:46,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:46,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:46,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:52:46,697 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:52:46,697 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:46,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:46,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:46,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877082061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:47,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-19 01:52:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102274703] [2024-11-19 01:52:47,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:47,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:52:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:52:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:52:47,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:47,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1153 transitions, 24423 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) [2024-11-19 01:52:47,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:47,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:47,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:49,000 INFO L124 PetriNetUnfolderBase]: 2960/5160 cut-off events. [2024-11-19 01:52:49,000 INFO L125 PetriNetUnfolderBase]: For 90750/90786 co-relation queries the response was YES. [2024-11-19 01:52:49,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47710 conditions, 5160 events. 2960/5160 cut-off events. For 90750/90786 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33170 event pairs, 129 based on Foata normal form. 50/5210 useless extension candidates. Maximal degree in co-relation 47079. Up to 1121 conditions per place. [2024-11-19 01:52:49,056 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 333 selfloop transitions, 1055 changer transitions 0/1460 dead transitions. [2024-11-19 01:52:49,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1460 transitions, 33376 flow [2024-11-19 01:52:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 01:52:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 01:52:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-11-19 01:52:49,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-19 01:52:49,059 INFO L175 Difference]: Start difference. First operand has 264 places, 1153 transitions, 24423 flow. Second operand 23 states and 230 transitions. [2024-11-19 01:52:49,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1460 transitions, 33376 flow [2024-11-19 01:52:50,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1460 transitions, 33219 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-11-19 01:52:50,484 INFO L231 Difference]: Finished difference. Result has 292 places, 1386 transitions, 33936 flow [2024-11-19 01:52:50,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24199, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=33936, PETRI_PLACES=292, PETRI_TRANSITIONS=1386} [2024-11-19 01:52:50,485 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2024-11-19 01:52:50,485 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 1386 transitions, 33936 flow [2024-11-19 01:52:50,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-19 01:52:50,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:50,486 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:50,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 01:52:50,686 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 [2024-11-19 01:52:50,687 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:50,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash 233897117, now seen corresponding path program 9 times [2024-11-19 01:52:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:50,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749970704] [2024-11-19 01:52:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:52:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:50,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:52:50,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:50,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749970704] [2024-11-19 01:52:50,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749970704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012175909] [2024-11-19 01:52:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:52:50,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:50,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:50,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:52:50,926 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:52:50,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:50,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:50,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:51,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012175909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:51,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:51,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-19 01:52:51,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39399696] [2024-11-19 01:52:51,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:51,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:52:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:52:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:52:51,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:52:51,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1386 transitions, 33936 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) [2024-11-19 01:52:51,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:51,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:52:51,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:53,362 INFO L124 PetriNetUnfolderBase]: 2958/5132 cut-off events. [2024-11-19 01:52:53,363 INFO L125 PetriNetUnfolderBase]: For 122590/122628 co-relation queries the response was YES. [2024-11-19 01:52:53,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53208 conditions, 5132 events. 2958/5132 cut-off events. For 122590/122628 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32832 event pairs, 211 based on Foata normal form. 16/5148 useless extension candidates. Maximal degree in co-relation 52584. Up to 1456 conditions per place. [2024-11-19 01:52:53,431 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 274 selfloop transitions, 1091 changer transitions 4/1441 dead transitions. [2024-11-19 01:52:53,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1441 transitions, 37325 flow [2024-11-19 01:52:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:52:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:52:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 192 transitions. [2024-11-19 01:52:53,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-19 01:52:53,433 INFO L175 Difference]: Start difference. First operand has 292 places, 1386 transitions, 33936 flow. Second operand 20 states and 192 transitions. [2024-11-19 01:52:53,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1441 transitions, 37325 flow [2024-11-19 01:52:55,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1441 transitions, 37101 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-11-19 01:52:55,083 INFO L231 Difference]: Finished difference. Result has 309 places, 1398 transitions, 36979 flow [2024-11-19 01:52:55,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=33627, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=36979, PETRI_PLACES=309, PETRI_TRANSITIONS=1398} [2024-11-19 01:52:55,085 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 286 predicate places. [2024-11-19 01:52:55,085 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 1398 transitions, 36979 flow [2024-11-19 01:52:55,085 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) [2024-11-19 01:52:55,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:55,085 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:52:55,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:52:55,285 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 [2024-11-19 01:52:55,286 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:52:55,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 363728341, now seen corresponding path program 10 times [2024-11-19 01:52:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806172619] [2024-11-19 01:52:55,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:52:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:55,296 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:52:55,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:55,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806172619] [2024-11-19 01:52:55,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806172619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956625385] [2024-11-19 01:52:55,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:52:55,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:55,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:55,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:55,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:52:55,507 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:52:55,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:55,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:52:55,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:55,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956625385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:55,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-19 01:52:55,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584247761] [2024-11-19 01:52:55,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:55,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:52:55,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:52:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:52:55,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:52:55,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1398 transitions, 36979 flow. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:55,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:55,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:52:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:00,012 INFO L124 PetriNetUnfolderBase]: 4611/7745 cut-off events. [2024-11-19 01:53:00,013 INFO L125 PetriNetUnfolderBase]: For 189094/189094 co-relation queries the response was YES. [2024-11-19 01:53:00,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86372 conditions, 7745 events. 4611/7745 cut-off events. For 189094/189094 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 49995 event pairs, 55 based on Foata normal form. 135/7880 useless extension candidates. Maximal degree in co-relation 86004. Up to 1757 conditions per place. [2024-11-19 01:53:00,112 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 703 selfloop transitions, 1611 changer transitions 6/2321 dead transitions. [2024-11-19 01:53:00,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 2321 transitions, 65045 flow [2024-11-19 01:53:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-19 01:53:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-19 01:53:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-19 01:53:00,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-11-19 01:53:00,115 INFO L175 Difference]: Start difference. First operand has 309 places, 1398 transitions, 36979 flow. Second operand 47 states and 403 transitions. [2024-11-19 01:53:00,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 2321 transitions, 65045 flow [2024-11-19 01:53:03,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2321 transitions, 64325 flow, removed 95 selfloop flow, removed 15 redundant places. [2024-11-19 01:53:03,941 INFO L231 Difference]: Finished difference. Result has 368 places, 2114 transitions, 62918 flow [2024-11-19 01:53:03,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=36061, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=62918, PETRI_PLACES=368, PETRI_TRANSITIONS=2114} [2024-11-19 01:53:03,943 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 345 predicate places. [2024-11-19 01:53:03,943 INFO L471 AbstractCegarLoop]: Abstraction has has 368 places, 2114 transitions, 62918 flow [2024-11-19 01:53:03,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:03,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:03,943 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:03,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:04,144 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 [2024-11-19 01:53:04,144 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:04,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1253793071, now seen corresponding path program 11 times [2024-11-19 01:53:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078165723] [2024-11-19 01:53:04,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:04,161 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:04,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078165723] [2024-11-19 01:53:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078165723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060792764] [2024-11-19 01:53:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:04,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:04,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:53:04,393 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:04,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:04,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:53:04,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:04,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060792764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:04,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:04,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-11-19 01:53:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738099652] [2024-11-19 01:53:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:04,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:53:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:53:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:53:04,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:53:04,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 2114 transitions, 62918 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:04,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:04,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:53:04,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:11,375 INFO L124 PetriNetUnfolderBase]: 6669/11409 cut-off events. [2024-11-19 01:53:11,375 INFO L125 PetriNetUnfolderBase]: For 381081/381123 co-relation queries the response was YES. [2024-11-19 01:53:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145414 conditions, 11409 events. 6669/11409 cut-off events. For 381081/381123 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 80035 event pairs, 115 based on Foata normal form. 133/11542 useless extension candidates. Maximal degree in co-relation 143714. Up to 2889 conditions per place. [2024-11-19 01:53:11,553 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 313 selfloop transitions, 2926 changer transitions 0/3365 dead transitions. [2024-11-19 01:53:11,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 3365 transitions, 108182 flow [2024-11-19 01:53:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 01:53:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-19 01:53:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 317 transitions. [2024-11-19 01:53:11,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4312925170068027 [2024-11-19 01:53:11,555 INFO L175 Difference]: Start difference. First operand has 368 places, 2114 transitions, 62918 flow. Second operand 35 states and 317 transitions. [2024-11-19 01:53:11,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 3365 transitions, 108182 flow [2024-11-19 01:53:20,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 3365 transitions, 107385 flow, removed 389 selfloop flow, removed 4 redundant places. [2024-11-19 01:53:20,754 INFO L231 Difference]: Finished difference. Result has 402 places, 3220 transitions, 105783 flow [2024-11-19 01:53:20,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=62326, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=105783, PETRI_PLACES=402, PETRI_TRANSITIONS=3220} [2024-11-19 01:53:20,756 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 379 predicate places. [2024-11-19 01:53:20,757 INFO L471 AbstractCegarLoop]: Abstraction has has 402 places, 3220 transitions, 105783 flow [2024-11-19 01:53:20,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:20,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:20,757 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:20,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 01:53:20,957 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 [2024-11-19 01:53:20,958 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:20,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:20,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1843114293, now seen corresponding path program 12 times [2024-11-19 01:53:20,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:20,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971613832] [2024-11-19 01:53:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:53:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:20,966 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:53:20,966 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:21,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971613832] [2024-11-19 01:53:21,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971613832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705171880] [2024-11-19 01:53:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:53:21,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:21,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:21,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:53:21,169 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:53:21,169 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:21,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:53:21,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:21,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:21,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705171880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:21,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:21,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 01:53:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14530562] [2024-11-19 01:53:21,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:21,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:53:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:53:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:53:21,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:53:21,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 3220 transitions, 105783 flow. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:21,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:21,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:53:21,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:23,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 01:53:37,074 INFO L124 PetriNetUnfolderBase]: 8617/14660 cut-off events. [2024-11-19 01:53:37,074 INFO L125 PetriNetUnfolderBase]: For 545228/545311 co-relation queries the response was YES. [2024-11-19 01:53:37,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200379 conditions, 14660 events. 8617/14660 cut-off events. For 545228/545311 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 107005 event pairs, 636 based on Foata normal form. 74/14733 useless extension candidates. Maximal degree in co-relation 198224. Up to 4877 conditions per place. [2024-11-19 01:53:37,279 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1324 selfloop transitions, 2826 changer transitions 0/4276 dead transitions. [2024-11-19 01:53:37,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 4276 transitions, 149555 flow [2024-11-19 01:53:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 01:53:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 01:53:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 259 transitions. [2024-11-19 01:53:37,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-11-19 01:53:37,281 INFO L175 Difference]: Start difference. First operand has 402 places, 3220 transitions, 105783 flow. Second operand 27 states and 259 transitions. [2024-11-19 01:53:37,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 4276 transitions, 149555 flow