./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-difference-det.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 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:29:13,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:29:13,342 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:29:13,349 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:29:13,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:29:13,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:29:13,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:29:13,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:29:13,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:29:13,374 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:29:13,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:29:13,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:29:13,375 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:29:13,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:29:13,377 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:29:13,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:29:13,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:29:13,386 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:29:13,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:29:13,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:29:13,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:29:13,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:29:13,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:29:13,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:29:13,392 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:29:13,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:29:13,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:29:13,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:29:13,393 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:29:13,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:29:13,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:29:13,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:29:13,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:13,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:29:13,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:29:13,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:29:13,397 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:29:13,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:29:13,398 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:29:13,398 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:29:13,398 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:29:13,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:29:13,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 [2024-11-16 19:29:13,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:29:13,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:29:13,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:29:13,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:29:13,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:29:13,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2024-11-16 19:29:15,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:29:15,285 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:29:15,286 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2024-11-16 19:29:15,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd83b0d6/d56dbcfdbb56453b905ac46a416fb8c4/FLAGe12759c19 [2024-11-16 19:29:15,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd83b0d6/d56dbcfdbb56453b905ac46a416fb8c4 [2024-11-16 19:29:15,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:29:15,333 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:29:15,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:15,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:29:15,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:29:15,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c3f1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15, skipping insertion in model container [2024-11-16 19:29:15,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:29:15,581 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-difference-det.wvr.c[2247,2260] [2024-11-16 19:29:15,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:15,592 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:29:15,608 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-difference-det.wvr.c[2247,2260] [2024-11-16 19:29:15,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:15,627 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:29:15,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15 WrapperNode [2024-11-16 19:29:15,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:15,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:15,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:29:15,632 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:29:15,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,662 INFO L138 Inliner]: procedures = 20, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2024-11-16 19:29:15,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:15,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:29:15,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:29:15,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:29:15,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,676 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,689 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 19:29:15,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,694 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:29:15,700 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:29:15,700 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:29:15,700 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:29:15,701 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (1/1) ... [2024-11-16 19:29:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:15,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:15,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:29:15,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:29:15,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:29:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:29:15,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:29:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:29:15,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:29:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:29:15,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:29:15,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-16 19:29:15,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-16 19:29:15,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:29:15,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:29:15,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:29:15,802 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:29:15,914 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:29:15,916 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:29:16,128 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:29:16,128 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:29:16,255 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:29:16,255 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:29:16,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:16 BoogieIcfgContainer [2024-11-16 19:29:16,256 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:29:16,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:29:16,257 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:29:16,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:29:16,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:29:15" (1/3) ... [2024-11-16 19:29:16,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76eb7561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:16, skipping insertion in model container [2024-11-16 19:29:16,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:15" (2/3) ... [2024-11-16 19:29:16,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76eb7561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:16, skipping insertion in model container [2024-11-16 19:29:16,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:16" (3/3) ... [2024-11-16 19:29:16,265 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-11-16 19:29:16,279 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:29:16,279 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:29:16,279 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:29:16,343 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:29:16,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 52 transitions, 132 flow [2024-11-16 19:29:16,425 INFO L124 PetriNetUnfolderBase]: 8/48 cut-off events. [2024-11-16 19:29:16,426 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:29:16,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 8/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-16 19:29:16,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 52 transitions, 132 flow [2024-11-16 19:29:16,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 47 transitions, 118 flow [2024-11-16 19:29:16,444 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:29:16,450 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;@58be268f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:29:16,452 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:29:16,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:29:16,475 INFO L124 PetriNetUnfolderBase]: 8/46 cut-off events. [2024-11-16 19:29:16,475 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:29:16,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:16,476 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:16,477 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:16,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1321796270, now seen corresponding path program 1 times [2024-11-16 19:29:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:16,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766762920] [2024-11-16 19:29:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:16,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:16,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766762920] [2024-11-16 19:29:16,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766762920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:16,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72321978] [2024-11-16 19:29:16,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:16,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:29:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:29:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:29:16,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-11-16 19:29:16,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:16,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:16,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-11-16 19:29:16,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:17,442 INFO L124 PetriNetUnfolderBase]: 3714/5238 cut-off events. [2024-11-16 19:29:17,444 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-11-16 19:29:17,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10430 conditions, 5238 events. 3714/5238 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28399 event pairs, 2787 based on Foata normal form. 927/6028 useless extension candidates. Maximal degree in co-relation 9347. Up to 4851 conditions per place. [2024-11-16 19:29:17,486 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 32 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2024-11-16 19:29:17,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 174 flow [2024-11-16 19:29:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:29:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:29:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-11-16 19:29:17,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-11-16 19:29:17,501 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 2 states and 66 transitions. [2024-11-16 19:29:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 174 flow [2024-11-16 19:29:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 158 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-16 19:29:17,523 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2024-11-16 19:29:17,525 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-16 19:29:17,529 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-16 19:29:17,532 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2024-11-16 19:29:17,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:17,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:17,532 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:17,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:29:17,533 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:17,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 238544656, now seen corresponding path program 1 times [2024-11-16 19:29:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:17,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787912395] [2024-11-16 19:29:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787912395] [2024-11-16 19:29:17,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787912395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:17,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:17,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418115052] [2024-11-16 19:29:17,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:17,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:29:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:29:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:29:17,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-11-16 19:29:17,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:17,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:17,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-11-16 19:29:17,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:18,294 INFO L124 PetriNetUnfolderBase]: 5145/7412 cut-off events. [2024-11-16 19:29:18,296 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-11-16 19:29:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14296 conditions, 7412 events. 5145/7412 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 42896 event pairs, 1020 based on Foata normal form. 1/7169 useless extension candidates. Maximal degree in co-relation 14293. Up to 5288 conditions per place. [2024-11-16 19:29:18,345 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 51 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2024-11-16 19:29:18,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 265 flow [2024-11-16 19:29:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:29:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:29:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-16 19:29:18,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-11-16 19:29:18,348 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 103 transitions. [2024-11-16 19:29:18,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 265 flow [2024-11-16 19:29:18,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 265 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:18,352 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 127 flow [2024-11-16 19:29:18,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-16 19:29:18,353 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-16 19:29:18,353 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 127 flow [2024-11-16 19:29:18,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:18,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:18,355 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:18,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:29:18,355 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:18,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1072475936, now seen corresponding path program 1 times [2024-11-16 19:29:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279696442] [2024-11-16 19:29:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279696442] [2024-11-16 19:29:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279696442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:18,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:18,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980292324] [2024-11-16 19:29:18,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:18,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:18,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:18,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-11-16 19:29:18,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-16 19:29:18,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:18,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-11-16 19:29:18,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:20,428 INFO L124 PetriNetUnfolderBase]: 15110/20948 cut-off events. [2024-11-16 19:29:20,429 INFO L125 PetriNetUnfolderBase]: For 2526/2602 co-relation queries the response was YES. [2024-11-16 19:29:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45481 conditions, 20948 events. 15110/20948 cut-off events. For 2526/2602 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 133300 event pairs, 5455 based on Foata normal form. 156/19861 useless extension candidates. Maximal degree in co-relation 45476. Up to 10756 conditions per place. [2024-11-16 19:29:20,571 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 108 selfloop transitions, 7 changer transitions 0/123 dead transitions. [2024-11-16 19:29:20,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 123 transitions, 568 flow [2024-11-16 19:29:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:29:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:29:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-16 19:29:20,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-16 19:29:20,574 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 127 flow. Second operand 5 states and 162 transitions. [2024-11-16 19:29:20,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 123 transitions, 568 flow [2024-11-16 19:29:20,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 123 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:20,581 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 170 flow [2024-11-16 19:29:20,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-16 19:29:20,582 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-16 19:29:20,582 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 170 flow [2024-11-16 19:29:20,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-16 19:29:20,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:20,583 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:20,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:29:20,584 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:20,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 407653068, now seen corresponding path program 2 times [2024-11-16 19:29:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640471104] [2024-11-16 19:29:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:20,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640471104] [2024-11-16 19:29:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640471104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29692043] [2024-11-16 19:29:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:20,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:20,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:29:20,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:20,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:20,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:20,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:20,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29692043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:21,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:21,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:29:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970876954] [2024-11-16 19:29:21,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:21,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:29:21,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:21,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:29:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:29:21,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:29:21,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 170 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:21,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:21,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:29:21,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:23,762 INFO L124 PetriNetUnfolderBase]: 23285/31732 cut-off events. [2024-11-16 19:29:23,763 INFO L125 PetriNetUnfolderBase]: For 10206/10206 co-relation queries the response was YES. [2024-11-16 19:29:23,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77033 conditions, 31732 events. 23285/31732 cut-off events. For 10206/10206 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 201900 event pairs, 2282 based on Foata normal form. 330/31870 useless extension candidates. Maximal degree in co-relation 77025. Up to 5452 conditions per place. [2024-11-16 19:29:23,958 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 268 selfloop transitions, 28 changer transitions 0/303 dead transitions. [2024-11-16 19:29:23,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 303 transitions, 1451 flow [2024-11-16 19:29:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:29:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:29:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 431 transitions. [2024-11-16 19:29:23,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592032967032967 [2024-11-16 19:29:23,962 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 170 flow. Second operand 14 states and 431 transitions. [2024-11-16 19:29:23,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 303 transitions, 1451 flow [2024-11-16 19:29:23,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 303 transitions, 1451 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:23,985 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 333 flow [2024-11-16 19:29:23,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=333, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-11-16 19:29:23,986 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-11-16 19:29:23,987 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 333 flow [2024-11-16 19:29:23,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:23,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:23,987 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:24,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:29:24,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:24,192 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:24,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -664026926, now seen corresponding path program 3 times [2024-11-16 19:29:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330196944] [2024-11-16 19:29:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:24,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:24,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:24,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330196944] [2024-11-16 19:29:24,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330196944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:24,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:24,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124718835] [2024-11-16 19:29:24,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:24,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:24,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:24,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-11-16 19:29:24,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:24,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:24,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-11-16 19:29:24,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:26,666 INFO L124 PetriNetUnfolderBase]: 26688/37961 cut-off events. [2024-11-16 19:29:26,666 INFO L125 PetriNetUnfolderBase]: For 46785/47247 co-relation queries the response was YES. [2024-11-16 19:29:26,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105425 conditions, 37961 events. 26688/37961 cut-off events. For 46785/47247 co-relation queries the response was YES. Maximal size of possible extension queue 1899. Compared 266082 event pairs, 8177 based on Foata normal form. 208/37599 useless extension candidates. Maximal degree in co-relation 105412. Up to 16384 conditions per place. [2024-11-16 19:29:27,142 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 166 selfloop transitions, 19 changer transitions 0/201 dead transitions. [2024-11-16 19:29:27,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 201 transitions, 1185 flow [2024-11-16 19:29:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:29:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:29:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-11-16 19:29:27,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-11-16 19:29:27,151 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 333 flow. Second operand 7 states and 223 transitions. [2024-11-16 19:29:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 201 transitions, 1185 flow [2024-11-16 19:29:27,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 201 transitions, 1120 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:27,940 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 448 flow [2024-11-16 19:29:27,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-11-16 19:29:27,942 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 27 predicate places. [2024-11-16 19:29:27,943 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 448 flow [2024-11-16 19:29:27,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:27,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:27,944 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:27,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:29:27,944 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:27,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 422764532, now seen corresponding path program 4 times [2024-11-16 19:29:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:27,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139715551] [2024-11-16 19:29:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:28,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139715551] [2024-11-16 19:29:28,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139715551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:28,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2687506] [2024-11-16 19:29:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:28,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:28,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:28,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:29:28,146 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:28,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:28,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:28,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2687506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:28,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:28,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088895873] [2024-11-16 19:29:28,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:28,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:28,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:28,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:29:28,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 448 flow. Second operand has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:28,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:28,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:29:28,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:33,461 INFO L124 PetriNetUnfolderBase]: 53392/71783 cut-off events. [2024-11-16 19:29:33,461 INFO L125 PetriNetUnfolderBase]: For 97611/97679 co-relation queries the response was YES. [2024-11-16 19:29:33,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209123 conditions, 71783 events. 53392/71783 cut-off events. For 97611/97679 co-relation queries the response was YES. Maximal size of possible extension queue 3375. Compared 476419 event pairs, 6272 based on Foata normal form. 702/72186 useless extension candidates. Maximal degree in co-relation 209104. Up to 12756 conditions per place. [2024-11-16 19:29:33,886 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 320 selfloop transitions, 73 changer transitions 0/400 dead transitions. [2024-11-16 19:29:33,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 400 transitions, 2293 flow [2024-11-16 19:29:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:29:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:29:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 523 transitions. [2024-11-16 19:29:33,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916289592760181 [2024-11-16 19:29:33,889 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 448 flow. Second operand 17 states and 523 transitions. [2024-11-16 19:29:33,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 400 transitions, 2293 flow [2024-11-16 19:29:34,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 400 transitions, 2275 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:34,898 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 1024 flow [2024-11-16 19:29:34,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1024, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2024-11-16 19:29:34,899 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-11-16 19:29:34,899 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 1024 flow [2024-11-16 19:29:34,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:34,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:34,900 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:34,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:29:35,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-16 19:29:35,105 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:35,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1148826918, now seen corresponding path program 5 times [2024-11-16 19:29:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:35,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3012917] [2024-11-16 19:29:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:35,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3012917] [2024-11-16 19:29:35,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3012917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:35,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:35,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904353108] [2024-11-16 19:29:35,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:35,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:35,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:29:35,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 1024 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 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) [2024-11-16 19:29:35,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:35,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:29:35,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:41,295 INFO L124 PetriNetUnfolderBase]: 53769/72833 cut-off events. [2024-11-16 19:29:41,295 INFO L125 PetriNetUnfolderBase]: For 203492/204134 co-relation queries the response was YES. [2024-11-16 19:29:41,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247003 conditions, 72833 events. 53769/72833 cut-off events. For 203492/204134 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 495275 event pairs, 15533 based on Foata normal form. 584/72999 useless extension candidates. Maximal degree in co-relation 246973. Up to 34193 conditions per place. [2024-11-16 19:29:41,855 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 160 selfloop transitions, 46 changer transitions 0/213 dead transitions. [2024-11-16 19:29:41,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 213 transitions, 1844 flow [2024-11-16 19:29:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:29:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:29:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-16 19:29:41,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-11-16 19:29:41,857 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 1024 flow. Second operand 5 states and 161 transitions. [2024-11-16 19:29:41,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 213 transitions, 1844 flow [2024-11-16 19:29:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 213 transitions, 1818 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:45,322 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 1294 flow [2024-11-16 19:29:45,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1294, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2024-11-16 19:29:45,323 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-11-16 19:29:45,324 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 1294 flow [2024-11-16 19:29:45,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 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) [2024-11-16 19:29:45,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:45,324 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:45,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:29:45,324 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:45,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash -623912582, now seen corresponding path program 6 times [2024-11-16 19:29:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:45,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434813083] [2024-11-16 19:29:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:45,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434813083] [2024-11-16 19:29:45,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434813083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:45,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:45,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:45,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235231813] [2024-11-16 19:29:45,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:45,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:45,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:45,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-11-16 19:29:45,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-16 19:29:45,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:45,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-11-16 19:29:45,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:50,607 INFO L124 PetriNetUnfolderBase]: 46452/64620 cut-off events. [2024-11-16 19:29:50,607 INFO L125 PetriNetUnfolderBase]: For 243475/243932 co-relation queries the response was YES. [2024-11-16 19:29:50,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233799 conditions, 64620 events. 46452/64620 cut-off events. For 243475/243932 co-relation queries the response was YES. Maximal size of possible extension queue 3109. Compared 458354 event pairs, 16957 based on Foata normal form. 234/63815 useless extension candidates. Maximal degree in co-relation 233765. Up to 39252 conditions per place. [2024-11-16 19:29:51,151 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 178 selfloop transitions, 36 changer transitions 0/236 dead transitions. [2024-11-16 19:29:51,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 2111 flow [2024-11-16 19:29:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-11-16 19:29:51,153 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-11-16 19:29:51,153 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 1294 flow. Second operand 6 states and 198 transitions. [2024-11-16 19:29:51,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 2111 flow [2024-11-16 19:29:54,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2063 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:54,088 INFO L231 Difference]: Finished difference. Result has 121 places, 143 transitions, 1404 flow [2024-11-16 19:29:54,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1404, PETRI_PLACES=121, PETRI_TRANSITIONS=143} [2024-11-16 19:29:54,089 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-16 19:29:54,089 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 143 transitions, 1404 flow [2024-11-16 19:29:54,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-16 19:29:54,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:54,090 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:54,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:29:54,090 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:54,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash -344369980, now seen corresponding path program 1 times [2024-11-16 19:29:54,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:54,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694211240] [2024-11-16 19:29:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694211240] [2024-11-16 19:29:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694211240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083351070] [2024-11-16 19:29:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:54,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:29:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:29:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:29:54,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-11-16 19:29:54,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 143 transitions, 1404 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:54,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:54,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-11-16 19:29:54,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:57,384 INFO L124 PetriNetUnfolderBase]: 24582/36188 cut-off events. [2024-11-16 19:29:57,384 INFO L125 PetriNetUnfolderBase]: For 159820/162946 co-relation queries the response was YES. [2024-11-16 19:29:57,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134834 conditions, 36188 events. 24582/36188 cut-off events. For 159820/162946 co-relation queries the response was YES. Maximal size of possible extension queue 1888. Compared 267956 event pairs, 8355 based on Foata normal form. 1028/35625 useless extension candidates. Maximal degree in co-relation 134796. Up to 22600 conditions per place. [2024-11-16 19:29:57,692 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 130 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2024-11-16 19:29:57,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1825 flow [2024-11-16 19:29:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:29:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:29:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-16 19:29:57,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-11-16 19:29:57,694 INFO L175 Difference]: Start difference. First operand has 121 places, 143 transitions, 1404 flow. Second operand 3 states and 103 transitions. [2024-11-16 19:29:57,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1825 flow [2024-11-16 19:29:58,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1781 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:58,699 INFO L231 Difference]: Finished difference. Result has 123 places, 143 transitions, 1373 flow [2024-11-16 19:29:58,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1373, PETRI_PLACES=123, PETRI_TRANSITIONS=143} [2024-11-16 19:29:58,700 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 71 predicate places. [2024-11-16 19:29:58,700 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 143 transitions, 1373 flow [2024-11-16 19:29:58,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:58,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:58,701 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:58,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:29:58,701 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:29:58,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:58,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1944389740, now seen corresponding path program 1 times [2024-11-16 19:29:58,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:58,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253732887] [2024-11-16 19:29:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:58,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:58,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:58,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253732887] [2024-11-16 19:29:58,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253732887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:58,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984429717] [2024-11-16 19:29:58,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:58,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:58,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:58,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-11-16 19:29:58,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 143 transitions, 1373 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:58,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:58,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-11-16 19:29:58,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:03,397 INFO L124 PetriNetUnfolderBase]: 35122/49312 cut-off events. [2024-11-16 19:30:03,397 INFO L125 PetriNetUnfolderBase]: For 184909/186041 co-relation queries the response was YES. [2024-11-16 19:30:03,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181743 conditions, 49312 events. 35122/49312 cut-off events. For 184909/186041 co-relation queries the response was YES. Maximal size of possible extension queue 2474. Compared 348130 event pairs, 9646 based on Foata normal form. 506/49295 useless extension candidates. Maximal degree in co-relation 181704. Up to 29604 conditions per place. [2024-11-16 19:30:03,798 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 195 selfloop transitions, 33 changer transitions 0/246 dead transitions. [2024-11-16 19:30:03,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 2252 flow [2024-11-16 19:30:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:30:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:30:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-16 19:30:03,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-16 19:30:03,799 INFO L175 Difference]: Start difference. First operand has 123 places, 143 transitions, 1373 flow. Second operand 7 states and 221 transitions. [2024-11-16 19:30:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 2252 flow [2024-11-16 19:30:05,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 246 transitions, 2249 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:30:05,133 INFO L231 Difference]: Finished difference. Result has 132 places, 148 transitions, 1549 flow [2024-11-16 19:30:05,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1549, PETRI_PLACES=132, PETRI_TRANSITIONS=148} [2024-11-16 19:30:05,134 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 80 predicate places. [2024-11-16 19:30:05,134 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 148 transitions, 1549 flow [2024-11-16 19:30:05,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:05,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:05,135 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:05,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:30:05,135 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:30:05,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 708021878, now seen corresponding path program 2 times [2024-11-16 19:30:05,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:05,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212470707] [2024-11-16 19:30:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:05,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:05,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:05,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212470707] [2024-11-16 19:30:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212470707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589222762] [2024-11-16 19:30:05,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:30:05,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:05,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:05,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:30:05,285 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:30:05,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:30:05,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:30:05,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:05,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:30:05,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589222762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:05,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:05,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:30:05,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393889625] [2024-11-16 19:30:05,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:05,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:30:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:05,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:30:05,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:30:05,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:30:05,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 148 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:05,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:05,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:30:05,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand