./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:50:52,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:50:52,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:50:52,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:50:52,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:50:52,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:50:52,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:50:52,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:50:52,280 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:50:52,280 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:50:52,280 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:50:52,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:50:52,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:50:52,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:50:52,282 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:50:52,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:50:52,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:50:52,283 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:50:52,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:50:52,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:50:52,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:50:52,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:50:52,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:50:52,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:50:52,286 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:50:52,287 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:50:52,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:50:52,287 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:50:52,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:50:52,288 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:50:52,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:50:52,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:50:52,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:52,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:50:52,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:50:52,290 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:50:52,290 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:50:52,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:50:52,291 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:50:52,291 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:50:52,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:50:52,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:50:52,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2024-11-19 01:50:52,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:50:52,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:50:52,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:50:52,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:50:52,588 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:50:52,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-19 01:50:54,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:50:54,283 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:50:54,284 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-19 01:50:54,291 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9161bdf87/c8fe7d046432491f969f7a0c5f6f8b76/FLAG88d9f3843 [2024-11-19 01:50:54,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9161bdf87/c8fe7d046432491f969f7a0c5f6f8b76 [2024-11-19 01:50:54,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:50:54,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:50:54,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:54,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:50:54,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:50:54,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f6a61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54, skipping insertion in model container [2024-11-19 01:50:54,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,352 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:50:54,541 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-19 01:50:54,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:54,560 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:50:54,580 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-19 01:50:54,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:54,602 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:50:54,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54 WrapperNode [2024-11-19 01:50:54,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:54,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:54,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:50:54,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:50:54,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,619 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,646 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 184 [2024-11-19 01:50:54,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:54,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:50:54,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:50:54,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:50:54,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,662 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,680 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 01:50:54,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,693 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:50:54,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:50:54,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:50:54,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:50:54,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (1/1) ... [2024-11-19 01:50:54,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:54,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:50:54,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:50:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:50:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:50:54,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:50:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:50:54,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:50:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 01:50:54,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 01:50:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:50:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:50:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:50:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:50:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:50:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:50:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:50:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:50:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:50:54,794 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:50:54,917 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:50:54,919 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:50:55,288 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:50:55,288 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:50:55,584 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:50:55,584 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 01:50:55,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:55 BoogieIcfgContainer [2024-11-19 01:50:55,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:50:55,588 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:50:55,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:50:55,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:50:55,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:50:54" (1/3) ... [2024-11-19 01:50:55,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577ebdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:55, skipping insertion in model container [2024-11-19 01:50:55,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:54" (2/3) ... [2024-11-19 01:50:55,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577ebdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:55, skipping insertion in model container [2024-11-19 01:50:55,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:55" (3/3) ... [2024-11-19 01:50:55,597 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2024-11-19 01:50:55,616 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:50:55,617 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:50:55,617 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:50:55,673 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 01:50:55,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2024-11-19 01:50:55,749 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-19 01:50:55,750 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:50:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-19 01:50:55,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2024-11-19 01:50:55,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2024-11-19 01:50:55,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:50:55,783 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;@780d1d33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:50:55,784 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-19 01:50:55,798 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:50:55,798 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-19 01:50:55,798 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:50:55,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:55,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:55,801 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 1 more)] === [2024-11-19 01:50:55,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash -896857593, now seen corresponding path program 1 times [2024-11-19 01:50:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576083828] [2024-11-19 01:50:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:56,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576083828] [2024-11-19 01:50:56,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576083828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:56,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:56,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:50:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111169] [2024-11-19 01:50:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:56,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:50:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:50:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:50:56,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:50:56,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:56,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:56,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:50:56,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:56,870 INFO L124 PetriNetUnfolderBase]: 818/1181 cut-off events. [2024-11-19 01:50:56,871 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-11-19 01:50:56,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1181 events. 818/1181 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4417 event pairs, 226 based on Foata normal form. 1/936 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2024-11-19 01:50:56,885 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 40 selfloop transitions, 6 changer transitions 1/48 dead transitions. [2024-11-19 01:50:56,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 223 flow [2024-11-19 01:50:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:50:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:50:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-11-19 01:50:56,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-19 01:50:56,900 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 4 states and 64 transitions. [2024-11-19 01:50:56,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 223 flow [2024-11-19 01:50:56,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 48 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 01:50:56,912 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 102 flow [2024-11-19 01:50:56,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-19 01:50:56,917 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2024-11-19 01:50:56,918 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 102 flow [2024-11-19 01:50:56,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:56,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:56,918 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] [2024-11-19 01:50:56,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:50:56,919 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 1 more)] === [2024-11-19 01:50:56,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1581822219, now seen corresponding path program 1 times [2024-11-19 01:50:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:56,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298340181] [2024-11-19 01:50:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298340181] [2024-11-19 01:50:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298340181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:57,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:57,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:50:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515026611] [2024-11-19 01:50:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:57,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:50:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:50:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:50:57,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:50:57,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:50:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:57,420 INFO L124 PetriNetUnfolderBase]: 1270/1951 cut-off events. [2024-11-19 01:50:57,420 INFO L125 PetriNetUnfolderBase]: For 155/170 co-relation queries the response was YES. [2024-11-19 01:50:57,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4176 conditions, 1951 events. 1270/1951 cut-off events. For 155/170 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9034 event pairs, 776 based on Foata normal form. 117/1794 useless extension candidates. Maximal degree in co-relation 2339. Up to 981 conditions per place. [2024-11-19 01:50:57,442 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 55 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-19 01:50:57,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 298 flow [2024-11-19 01:50:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:50:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:50:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-19 01:50:57,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-19 01:50:57,444 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 102 flow. Second operand 5 states and 90 transitions. [2024-11-19 01:50:57,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 298 flow [2024-11-19 01:50:57,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 65 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 01:50:57,448 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 123 flow [2024-11-19 01:50:57,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-11-19 01:50:57,449 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-11-19 01:50:57,449 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 123 flow [2024-11-19 01:50:57,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:57,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:57,451 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] [2024-11-19 01:50:57,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:50:57,451 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 1 more)] === [2024-11-19 01:50:57,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1699900938, now seen corresponding path program 1 times [2024-11-19 01:50:57,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:57,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564827498] [2024-11-19 01:50:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:57,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564827498] [2024-11-19 01:50:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564827498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830905962] [2024-11-19 01:50:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:57,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:57,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:57,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:50:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:57,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:50:57,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:57,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:57,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830905962] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:57,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:50:57,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 01:50:57,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894219911] [2024-11-19 01:50:57,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:57,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:50:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:50:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:50:57,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:50:57,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:57,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:57,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:50:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:58,570 INFO L124 PetriNetUnfolderBase]: 1546/2420 cut-off events. [2024-11-19 01:50:58,571 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-11-19 01:50:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5792 conditions, 2420 events. 1546/2420 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11999 event pairs, 555 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 3561. Up to 634 conditions per place. [2024-11-19 01:50:58,589 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 96 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-11-19 01:50:58,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 119 transitions, 612 flow [2024-11-19 01:50:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:50:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:50:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-11-19 01:50:58,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451612903225806 [2024-11-19 01:50:58,593 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 123 flow. Second operand 10 states and 169 transitions. [2024-11-19 01:50:58,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 119 transitions, 612 flow [2024-11-19 01:50:58,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 119 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:58,597 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 227 flow [2024-11-19 01:50:58,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=227, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-19 01:50:58,598 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-11-19 01:50:58,599 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 227 flow [2024-11-19 01:50:58,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:58,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:58,599 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] [2024-11-19 01:50:58,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:50:58,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:58,801 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 1 more)] === [2024-11-19 01:50:58,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash -128183186, now seen corresponding path program 2 times [2024-11-19 01:50:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218947068] [2024-11-19 01:50:58,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:58,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:58,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:58,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:58,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218947068] [2024-11-19 01:50:58,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218947068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:58,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750622151] [2024-11-19 01:50:58,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:58,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:58,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:58,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:58,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:50:59,069 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:59,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:59,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:50:59,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:59,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750622151] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:59,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:50:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 01:50:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213671299] [2024-11-19 01:50:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:59,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:50:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:50:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:50:59,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:50:59,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:59,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:59,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:50:59,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:59,830 INFO L124 PetriNetUnfolderBase]: 1822/2822 cut-off events. [2024-11-19 01:50:59,830 INFO L125 PetriNetUnfolderBase]: For 3358/3358 co-relation queries the response was YES. [2024-11-19 01:50:59,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 2822 events. 1822/2822 cut-off events. For 3358/3358 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13986 event pairs, 488 based on Foata normal form. 12/2820 useless extension candidates. Maximal degree in co-relation 5995. Up to 520 conditions per place. [2024-11-19 01:50:59,853 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-11-19 01:50:59,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 148 transitions, 937 flow [2024-11-19 01:50:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:50:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:50:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-11-19 01:50:59,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2024-11-19 01:50:59,856 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 227 flow. Second operand 12 states and 190 transitions. [2024-11-19 01:50:59,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 148 transitions, 937 flow [2024-11-19 01:50:59,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 148 transitions, 934 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:50:59,878 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 493 flow [2024-11-19 01:50:59,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=493, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-19 01:50:59,879 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2024-11-19 01:50:59,880 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 493 flow [2024-11-19 01:50:59,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:50:59,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:59,881 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] [2024-11-19 01:50:59,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:00,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 01:51:00,082 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 1 more)] === [2024-11-19 01:51:00,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash -696053986, now seen corresponding path program 3 times [2024-11-19 01:51:00,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:00,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852655899] [2024-11-19 01:51:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:00,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:00,102 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:51:00,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:00,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852655899] [2024-11-19 01:51:00,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852655899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:00,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054268503] [2024-11-19 01:51:00,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:00,209 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) [2024-11-19 01:51:00,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:51:00,293 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:51:00,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:00,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:51:00,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:00,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054268503] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:00,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:51:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-19 01:51:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228907130] [2024-11-19 01:51:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:00,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:51:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:51:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:51:00,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:01,101 INFO L124 PetriNetUnfolderBase]: 2231/3463 cut-off events. [2024-11-19 01:51:01,102 INFO L125 PetriNetUnfolderBase]: For 8996/8996 co-relation queries the response was YES. [2024-11-19 01:51:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13047 conditions, 3463 events. 2231/3463 cut-off events. For 8996/8996 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17916 event pairs, 675 based on Foata normal form. 14/3459 useless extension candidates. Maximal degree in co-relation 10754. Up to 946 conditions per place. [2024-11-19 01:51:01,133 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-11-19 01:51:01,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 170 transitions, 1335 flow [2024-11-19 01:51:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:51:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:51:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-11-19 01:51:01,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601173020527859 [2024-11-19 01:51:01,135 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 493 flow. Second operand 11 states and 191 transitions. [2024-11-19 01:51:01,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 170 transitions, 1335 flow [2024-11-19 01:51:01,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 170 transitions, 1286 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-19 01:51:01,181 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 859 flow [2024-11-19 01:51:01,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-11-19 01:51:01,182 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-11-19 01:51:01,182 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 859 flow [2024-11-19 01:51:01,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:01,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:01,183 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] [2024-11-19 01:51:01,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:51:01,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:01,384 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 1 more)] === [2024-11-19 01:51:01,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -541366580, now seen corresponding path program 4 times [2024-11-19 01:51:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810015656] [2024-11-19 01:51:01,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:01,400 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:01,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:01,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:01,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810015656] [2024-11-19 01:51:01,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810015656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:01,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971710187] [2024-11-19 01:51:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:01,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:01,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:01,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:01,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:51:01,578 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:01,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:01,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:51:01,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:01,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:01,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971710187] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:01,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:51:01,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-19 01:51:01,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497671270] [2024-11-19 01:51:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:01,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:51:01,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:51:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:51:01,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:01,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:01,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:01,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:01,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:02,471 INFO L124 PetriNetUnfolderBase]: 2279/3549 cut-off events. [2024-11-19 01:51:02,472 INFO L125 PetriNetUnfolderBase]: For 14513/14548 co-relation queries the response was YES. [2024-11-19 01:51:02,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15126 conditions, 3549 events. 2279/3549 cut-off events. For 14513/14548 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18630 event pairs, 614 based on Foata normal form. 14/3552 useless extension candidates. Maximal degree in co-relation 12335. Up to 763 conditions per place. [2024-11-19 01:51:02,518 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-11-19 01:51:02,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 166 transitions, 1543 flow [2024-11-19 01:51:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:51:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:51:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-11-19 01:51:02,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5612903225806452 [2024-11-19 01:51:02,520 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 859 flow. Second operand 10 states and 174 transitions. [2024-11-19 01:51:02,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 166 transitions, 1543 flow [2024-11-19 01:51:02,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 166 transitions, 1474 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-19 01:51:02,572 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1058 flow [2024-11-19 01:51:02,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1058, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-11-19 01:51:02,573 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-11-19 01:51:02,574 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1058 flow [2024-11-19 01:51:02,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:02,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:02,574 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] [2024-11-19 01:51:02,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:02,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:02,779 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 1 more)] === [2024-11-19 01:51:02,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1070215590, now seen corresponding path program 5 times [2024-11-19 01:51:02,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:02,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204241036] [2024-11-19 01:51:02,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:02,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:02,792 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:02,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:02,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:02,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204241036] [2024-11-19 01:51:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204241036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:02,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026703307] [2024-11-19 01:51:02,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:02,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:02,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:02,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:51:02,985 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:02,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:02,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:51:02,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:03,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026703307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:03,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:03,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-19 01:51:03,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759709159] [2024-11-19 01:51:03,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:03,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:51:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:51:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:51:03,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:03,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1058 flow. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:03,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:03,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:03,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:04,461 INFO L124 PetriNetUnfolderBase]: 2673/4122 cut-off events. [2024-11-19 01:51:04,462 INFO L125 PetriNetUnfolderBase]: For 20431/20431 co-relation queries the response was YES. [2024-11-19 01:51:04,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18561 conditions, 4122 events. 2673/4122 cut-off events. For 20431/20431 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22314 event pairs, 402 based on Foata normal form. 12/4112 useless extension candidates. Maximal degree in co-relation 16075. Up to 772 conditions per place. [2024-11-19 01:51:04,500 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 176 selfloop transitions, 166 changer transitions 0/347 dead transitions. [2024-11-19 01:51:04,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 347 transitions, 3734 flow [2024-11-19 01:51:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 01:51:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 01:51:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 398 transitions. [2024-11-19 01:51:04,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4755077658303465 [2024-11-19 01:51:04,503 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1058 flow. Second operand 27 states and 398 transitions. [2024-11-19 01:51:04,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 347 transitions, 3734 flow [2024-11-19 01:51:04,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 347 transitions, 3633 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-19 01:51:04,573 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2767 flow [2024-11-19 01:51:04,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2767, PETRI_PLACES=121, PETRI_TRANSITIONS=217} [2024-11-19 01:51:04,574 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2024-11-19 01:51:04,575 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2767 flow [2024-11-19 01:51:04,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:04,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:04,575 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] [2024-11-19 01:51:04,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:51:04,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:04,776 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 1 more)] === [2024-11-19 01:51:04,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 14272694, now seen corresponding path program 6 times [2024-11-19 01:51:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817234475] [2024-11-19 01:51:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:51:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:04,799 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:51:04,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:04,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:04,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817234475] [2024-11-19 01:51:04,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817234475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:04,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710241089] [2024-11-19 01:51:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:51:04,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:04,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:04,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:51:04,986 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:51:04,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:04,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:51:04,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:05,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:05,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710241089] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:05,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:51:05,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-19 01:51:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763309604] [2024-11-19 01:51:05,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:05,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:51:05,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:51:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:51:05,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:05,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 217 transitions, 2767 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:05,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:05,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:05,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:05,854 INFO L124 PetriNetUnfolderBase]: 2666/4114 cut-off events. [2024-11-19 01:51:05,855 INFO L125 PetriNetUnfolderBase]: For 30502/30512 co-relation queries the response was YES. [2024-11-19 01:51:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 4114 events. 2666/4114 cut-off events. For 30502/30512 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22125 event pairs, 451 based on Foata normal form. 12/4105 useless extension candidates. Maximal degree in co-relation 19238. Up to 765 conditions per place. [2024-11-19 01:51:05,910 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 157 selfloop transitions, 135 changer transitions 0/297 dead transitions. [2024-11-19 01:51:05,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 297 transitions, 3782 flow [2024-11-19 01:51:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:51:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:51:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-11-19 01:51:05,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2024-11-19 01:51:05,912 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2767 flow. Second operand 12 states and 195 transitions. [2024-11-19 01:51:05,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 297 transitions, 3782 flow [2024-11-19 01:51:06,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 297 transitions, 3642 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-11-19 01:51:06,051 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3136 flow [2024-11-19 01:51:06,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3136, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2024-11-19 01:51:06,052 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2024-11-19 01:51:06,052 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3136 flow [2024-11-19 01:51:06,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:06,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:06,052 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] [2024-11-19 01:51:06,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:06,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:06,253 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 1 more)] === [2024-11-19 01:51:06,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:06,254 INFO L85 PathProgramCache]: Analyzing trace with hash -611761397, now seen corresponding path program 1 times [2024-11-19 01:51:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654070700] [2024-11-19 01:51:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654070700] [2024-11-19 01:51:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654070700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:51:06,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:51:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:51:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353144142] [2024-11-19 01:51:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:06,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:51:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:51:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:51:06,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:06,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 3136 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:06,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:06,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:06,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:06,899 INFO L124 PetriNetUnfolderBase]: 2274/3488 cut-off events. [2024-11-19 01:51:06,900 INFO L125 PetriNetUnfolderBase]: For 37642/37650 co-relation queries the response was YES. [2024-11-19 01:51:06,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19836 conditions, 3488 events. 2274/3488 cut-off events. For 37642/37650 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17845 event pairs, 835 based on Foata normal form. 77/3531 useless extension candidates. Maximal degree in co-relation 18344. Up to 2657 conditions per place. [2024-11-19 01:51:06,948 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 215 selfloop transitions, 7 changer transitions 0/227 dead transitions. [2024-11-19 01:51:06,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 227 transitions, 3551 flow [2024-11-19 01:51:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:51:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:51:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-19 01:51:06,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-19 01:51:06,950 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3136 flow. Second operand 5 states and 85 transitions. [2024-11-19 01:51:06,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 227 transitions, 3551 flow [2024-11-19 01:51:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 227 transitions, 3426 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-19 01:51:07,112 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2872 flow [2024-11-19 01:51:07,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2872, PETRI_PLACES=122, PETRI_TRANSITIONS=201} [2024-11-19 01:51:07,113 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-11-19 01:51:07,113 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2872 flow [2024-11-19 01:51:07,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:07,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:07,113 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] [2024-11-19 01:51:07,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:51:07,113 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 1 more)] === [2024-11-19 01:51:07,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1970947570, now seen corresponding path program 1 times [2024-11-19 01:51:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:07,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26093285] [2024-11-19 01:51:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:07,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26093285] [2024-11-19 01:51:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26093285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:51:07,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:51:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:51:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841250533] [2024-11-19 01:51:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:07,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:51:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:51:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:51:07,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:07,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 201 transitions, 2872 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:07,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:07,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:07,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:07,641 INFO L124 PetriNetUnfolderBase]: 2066/3140 cut-off events. [2024-11-19 01:51:07,641 INFO L125 PetriNetUnfolderBase]: For 34260/34268 co-relation queries the response was YES. [2024-11-19 01:51:07,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18165 conditions, 3140 events. 2066/3140 cut-off events. For 34260/34268 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15328 event pairs, 770 based on Foata normal form. 22/3128 useless extension candidates. Maximal degree in co-relation 17409. Up to 2657 conditions per place. [2024-11-19 01:51:07,672 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 179 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2024-11-19 01:51:07,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3288 flow [2024-11-19 01:51:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:51:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:51:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-19 01:51:07,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-19 01:51:07,675 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2872 flow. Second operand 5 states and 79 transitions. [2024-11-19 01:51:07,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3288 flow [2024-11-19 01:51:07,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3151 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-11-19 01:51:07,810 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2024-11-19 01:51:07,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2651, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2024-11-19 01:51:07,811 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-11-19 01:51:07,811 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2024-11-19 01:51:07,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:07,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:07,813 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] [2024-11-19 01:51:07,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 01:51:07,814 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 1 more)] === [2024-11-19 01:51:07,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1671837567, now seen corresponding path program 1 times [2024-11-19 01:51:07,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:07,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111283253] [2024-11-19 01:51:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:07,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111283253] [2024-11-19 01:51:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111283253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589938011] [2024-11-19 01:51:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:07,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:07,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:07,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:07,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:51:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:07,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:51:07,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:08,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589938011] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:08,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:51:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 01:51:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051486624] [2024-11-19 01:51:08,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:08,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:51:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:51:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:51:08,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-19 01:51:08,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2651 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:08,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:08,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-19 01:51:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:08,370 INFO L124 PetriNetUnfolderBase]: 2082/3100 cut-off events. [2024-11-19 01:51:08,370 INFO L125 PetriNetUnfolderBase]: For 32049/32060 co-relation queries the response was YES. [2024-11-19 01:51:08,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17968 conditions, 3100 events. 2082/3100 cut-off events. For 32049/32060 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14970 event pairs, 449 based on Foata normal form. 168/3168 useless extension candidates. Maximal degree in co-relation 17916. Up to 2264 conditions per place. [2024-11-19 01:51:08,402 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 259 selfloop transitions, 13 changer transitions 0/277 dead transitions. [2024-11-19 01:51:08,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 277 transitions, 4606 flow [2024-11-19 01:51:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:51:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:51:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-19 01:51:08,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-19 01:51:08,403 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 70 transitions. [2024-11-19 01:51:08,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 277 transitions, 4606 flow [2024-11-19 01:51:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 277 transitions, 4519 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-11-19 01:51:08,584 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2024-11-19 01:51:08,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2024-11-19 01:51:08,586 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2024-11-19 01:51:08,586 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2024-11-19 01:51:08,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:08,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:08,587 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] [2024-11-19 01:51:08,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 01:51:08,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:08,788 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:08,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1124071453, now seen corresponding path program 1 times [2024-11-19 01:51:08,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:08,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527842886] [2024-11-19 01:51:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:08,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527842886] [2024-11-19 01:51:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527842886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996662441] [2024-11-19 01:51:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:09,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:09,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:51:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:09,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 01:51:09,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:09,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:51:09,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:09,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:10,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 01:51:10,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:10,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2024-11-19 01:51:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996662441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:10,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:10,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-19 01:51:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10763245] [2024-11-19 01:51:10,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:10,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 01:51:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 01:51:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-19 01:51:10,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:10,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:10,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:10,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:10,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:12,138 INFO L124 PetriNetUnfolderBase]: 4393/6244 cut-off events. [2024-11-19 01:51:12,138 INFO L125 PetriNetUnfolderBase]: For 47636/47636 co-relation queries the response was YES. [2024-11-19 01:51:12,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 6244 events. 4393/6244 cut-off events. For 47636/47636 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29660 event pairs, 327 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 29315. Up to 3993 conditions per place. [2024-11-19 01:51:12,193 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 597 selfloop transitions, 102 changer transitions 2/702 dead transitions. [2024-11-19 01:51:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 10479 flow [2024-11-19 01:51:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:51:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:51:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-11-19 01:51:12,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-11-19 01:51:12,195 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 14 states and 218 transitions. [2024-11-19 01:51:12,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 10479 flow [2024-11-19 01:51:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 702 transitions, 10441 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 01:51:12,544 INFO L231 Difference]: Finished difference. Result has 125 places, 285 transitions, 4291 flow [2024-11-19 01:51:12,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4291, PETRI_PLACES=125, PETRI_TRANSITIONS=285} [2024-11-19 01:51:12,545 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-11-19 01:51:12,545 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 285 transitions, 4291 flow [2024-11-19 01:51:12,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:12,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:12,546 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] [2024-11-19 01:51:12,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:12,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 01:51:12,746 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:12,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1688595341, now seen corresponding path program 2 times [2024-11-19 01:51:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333109229] [2024-11-19 01:51:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:12,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:12,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:13,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333109229] [2024-11-19 01:51:13,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333109229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:13,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30130283] [2024-11-19 01:51:13,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:13,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:13,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:13,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:13,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:51:13,231 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:13,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:13,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 01:51:13,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:13,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:51:13,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:13,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:13,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 01:51:13,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:13,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2024-11-19 01:51:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30130283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:13,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-19 01:51:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416998105] [2024-11-19 01:51:13,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:13,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 01:51:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 01:51:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-19 01:51:13,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:13,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 285 transitions, 4291 flow. Second operand has 22 states, 22 states have (on average 6.590909090909091) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:13,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:13,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:13,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:15,315 INFO L124 PetriNetUnfolderBase]: 5671/8045 cut-off events. [2024-11-19 01:51:15,315 INFO L125 PetriNetUnfolderBase]: For 70073/70073 co-relation queries the response was YES. [2024-11-19 01:51:15,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46921 conditions, 8045 events. 5671/8045 cut-off events. For 70073/70073 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39506 event pairs, 617 based on Foata normal form. 2/8047 useless extension candidates. Maximal degree in co-relation 44445. Up to 6094 conditions per place. [2024-11-19 01:51:15,378 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 617 selfloop transitions, 118 changer transitions 2/738 dead transitions. [2024-11-19 01:51:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 738 transitions, 11769 flow [2024-11-19 01:51:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:51:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:51:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 205 transitions. [2024-11-19 01:51:15,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47235023041474655 [2024-11-19 01:51:15,381 INFO L175 Difference]: Start difference. First operand has 125 places, 285 transitions, 4291 flow. Second operand 14 states and 205 transitions. [2024-11-19 01:51:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 738 transitions, 11769 flow [2024-11-19 01:51:15,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 738 transitions, 11701 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-11-19 01:51:15,807 INFO L231 Difference]: Finished difference. Result has 143 places, 392 transitions, 6340 flow [2024-11-19 01:51:15,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6340, PETRI_PLACES=143, PETRI_TRANSITIONS=392} [2024-11-19 01:51:15,808 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 110 predicate places. [2024-11-19 01:51:15,808 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 392 transitions, 6340 flow [2024-11-19 01:51:15,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.590909090909091) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:15,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:15,809 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] [2024-11-19 01:51:15,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:51:16,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 01:51:16,010 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:16,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2110501188, now seen corresponding path program 1 times [2024-11-19 01:51:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:16,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918341025] [2024-11-19 01:51:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918341025] [2024-11-19 01:51:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918341025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795145219] [2024-11-19 01:51:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:16,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:51:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:16,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 01:51:16,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:16,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:16,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:16,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:16,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-11-19 01:51:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795145219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:16,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 18 [2024-11-19 01:51:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831896724] [2024-11-19 01:51:16,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:16,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:51:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:51:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:51:16,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:16,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 392 transitions, 6340 flow. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:16,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:16,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:18,885 INFO L124 PetriNetUnfolderBase]: 7538/10684 cut-off events. [2024-11-19 01:51:18,885 INFO L125 PetriNetUnfolderBase]: For 104643/104643 co-relation queries the response was YES. [2024-11-19 01:51:18,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66151 conditions, 10684 events. 7538/10684 cut-off events. For 104643/104643 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55632 event pairs, 787 based on Foata normal form. 2/10686 useless extension candidates. Maximal degree in co-relation 63323. Up to 7884 conditions per place. [2024-11-19 01:51:18,999 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 593 selfloop transitions, 178 changer transitions 1/773 dead transitions. [2024-11-19 01:51:19,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 773 transitions, 13398 flow [2024-11-19 01:51:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:51:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:51:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 185 transitions. [2024-11-19 01:51:19,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45905707196029777 [2024-11-19 01:51:19,002 INFO L175 Difference]: Start difference. First operand has 143 places, 392 transitions, 6340 flow. Second operand 13 states and 185 transitions. [2024-11-19 01:51:19,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 773 transitions, 13398 flow [2024-11-19 01:51:19,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 773 transitions, 13113 flow, removed 140 selfloop flow, removed 2 redundant places. [2024-11-19 01:51:19,986 INFO L231 Difference]: Finished difference. Result has 161 places, 541 transitions, 8949 flow [2024-11-19 01:51:19,987 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8949, PETRI_PLACES=161, PETRI_TRANSITIONS=541} [2024-11-19 01:51:19,987 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 128 predicate places. [2024-11-19 01:51:19,987 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 541 transitions, 8949 flow [2024-11-19 01:51:19,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:19,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:19,988 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] [2024-11-19 01:51:20,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 01:51:20,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 01:51:20,193 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:20,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash -451488706, now seen corresponding path program 2 times [2024-11-19 01:51:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012877539] [2024-11-19 01:51:20,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:20,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:20,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012877539] [2024-11-19 01:51:20,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012877539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953622753] [2024-11-19 01:51:20,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:20,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:20,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:51:20,540 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:20,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:20,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 01:51:20,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:20,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:20,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:20,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:20,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 01:51:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953622753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:20,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-11-19 01:51:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205895185] [2024-11-19 01:51:20,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:20,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:51:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:51:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:51:20,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:20,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 541 transitions, 8949 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:20,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:20,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:20,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:22,757 INFO L124 PetriNetUnfolderBase]: 9431/13381 cut-off events. [2024-11-19 01:51:22,758 INFO L125 PetriNetUnfolderBase]: For 145503/145503 co-relation queries the response was YES. [2024-11-19 01:51:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89163 conditions, 13381 events. 9431/13381 cut-off events. For 145503/145503 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 72124 event pairs, 583 based on Foata normal form. 2/13383 useless extension candidates. Maximal degree in co-relation 86058. Up to 8969 conditions per place. [2024-11-19 01:51:22,887 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 695 selfloop transitions, 229 changer transitions 1/926 dead transitions. [2024-11-19 01:51:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 926 transitions, 16369 flow [2024-11-19 01:51:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:51:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:51:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-11-19 01:51:22,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49379652605459057 [2024-11-19 01:51:22,889 INFO L175 Difference]: Start difference. First operand has 161 places, 541 transitions, 8949 flow. Second operand 13 states and 199 transitions. [2024-11-19 01:51:22,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 926 transitions, 16369 flow [2024-11-19 01:51:24,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 926 transitions, 16317 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 01:51:24,246 INFO L231 Difference]: Finished difference. Result has 175 places, 669 transitions, 11532 flow [2024-11-19 01:51:24,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11532, PETRI_PLACES=175, PETRI_TRANSITIONS=669} [2024-11-19 01:51:24,247 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 142 predicate places. [2024-11-19 01:51:24,247 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 669 transitions, 11532 flow [2024-11-19 01:51:24,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:24,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:24,248 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] [2024-11-19 01:51:24,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:24,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:51:24,448 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:24,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1086672619, now seen corresponding path program 3 times [2024-11-19 01:51:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:24,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384254175] [2024-11-19 01:51:24,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:24,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:24,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:51:24,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:24,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384254175] [2024-11-19 01:51:24,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384254175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:24,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274882006] [2024-11-19 01:51:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:24,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:24,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:24,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:51:24,943 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:51:24,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:24,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 01:51:24,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:24,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:51:25,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:25,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:25,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 01:51:25,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:25,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2024-11-19 01:51:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274882006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:25,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:25,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-19 01:51:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306390924] [2024-11-19 01:51:25,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:25,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 01:51:25,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 01:51:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-19 01:51:25,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:25,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 669 transitions, 11532 flow. Second operand has 22 states, 22 states have (on average 6.590909090909091) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:25,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:25,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:28,821 INFO L124 PetriNetUnfolderBase]: 10840/15386 cut-off events. [2024-11-19 01:51:28,821 INFO L125 PetriNetUnfolderBase]: For 194436/194436 co-relation queries the response was YES. [2024-11-19 01:51:28,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110210 conditions, 15386 events. 10840/15386 cut-off events. For 194436/194436 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 85245 event pairs, 1158 based on Foata normal form. 2/15388 useless extension candidates. Maximal degree in co-relation 106935. Up to 12808 conditions per place. [2024-11-19 01:51:28,994 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 952 selfloop transitions, 169 changer transitions 2/1124 dead transitions. [2024-11-19 01:51:28,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1124 transitions, 20937 flow [2024-11-19 01:51:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:51:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:51:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-11-19 01:51:28,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4861751152073733 [2024-11-19 01:51:28,997 INFO L175 Difference]: Start difference. First operand has 175 places, 669 transitions, 11532 flow. Second operand 14 states and 211 transitions. [2024-11-19 01:51:28,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1124 transitions, 20937 flow [2024-11-19 01:51:30,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1124 transitions, 20373 flow, removed 210 selfloop flow, removed 4 redundant places. [2024-11-19 01:51:30,646 INFO L231 Difference]: Finished difference. Result has 191 places, 780 transitions, 13703 flow [2024-11-19 01:51:30,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13703, PETRI_PLACES=191, PETRI_TRANSITIONS=780} [2024-11-19 01:51:30,647 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 158 predicate places. [2024-11-19 01:51:30,648 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 780 transitions, 13703 flow [2024-11-19 01:51:30,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.590909090909091) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:30,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:30,648 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] [2024-11-19 01:51:30,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:30,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 01:51:30,849 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:30,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash 395568145, now seen corresponding path program 4 times [2024-11-19 01:51:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:30,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640830145] [2024-11-19 01:51:30,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:30,862 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:30,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:31,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:31,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640830145] [2024-11-19 01:51:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640830145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:31,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802356025] [2024-11-19 01:51:31,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:31,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:31,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:31,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:51:31,300 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:31,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:31,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 01:51:31,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:31,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:51:31,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:31,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802356025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:31,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2024-11-19 01:51:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347717034] [2024-11-19 01:51:31,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:31,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 01:51:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 01:51:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2024-11-19 01:51:31,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:31,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 780 transitions, 13703 flow. Second operand has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:31,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:31,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:31,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:37,031 INFO L124 PetriNetUnfolderBase]: 13950/19788 cut-off events. [2024-11-19 01:51:37,031 INFO L125 PetriNetUnfolderBase]: For 262436/262436 co-relation queries the response was YES. [2024-11-19 01:51:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144808 conditions, 19788 events. 13950/19788 cut-off events. For 262436/262436 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 114087 event pairs, 1021 based on Foata normal form. 2/19790 useless extension candidates. Maximal degree in co-relation 141212. Up to 14127 conditions per place. [2024-11-19 01:51:37,247 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 942 selfloop transitions, 549 changer transitions 1/1493 dead transitions. [2024-11-19 01:51:37,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1493 transitions, 27515 flow [2024-11-19 01:51:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 01:51:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-19 01:51:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 419 transitions. [2024-11-19 01:51:37,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35568760611205436 [2024-11-19 01:51:37,250 INFO L175 Difference]: Start difference. First operand has 191 places, 780 transitions, 13703 flow. Second operand 38 states and 419 transitions. [2024-11-19 01:51:37,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1493 transitions, 27515 flow [2024-11-19 01:51:39,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1493 transitions, 26925 flow, removed 258 selfloop flow, removed 4 redundant places. [2024-11-19 01:51:39,705 INFO L231 Difference]: Finished difference. Result has 238 places, 1186 transitions, 21684 flow [2024-11-19 01:51:39,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21684, PETRI_PLACES=238, PETRI_TRANSITIONS=1186} [2024-11-19 01:51:39,706 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 205 predicate places. [2024-11-19 01:51:39,706 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 1186 transitions, 21684 flow [2024-11-19 01:51:39,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.24) internal successors, (156), 25 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:39,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:39,707 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] [2024-11-19 01:51:39,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 01:51:39,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:51:39,908 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:39,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 514554797, now seen corresponding path program 5 times [2024-11-19 01:51:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:39,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364956975] [2024-11-19 01:51:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:39,926 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:51:39,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:40,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364956975] [2024-11-19 01:51:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364956975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062633313] [2024-11-19 01:51:40,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:40,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:40,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:40,163 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:40,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:51:40,246 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:51:40,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:40,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 01:51:40,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:40,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:51:40,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:40,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-11-19 01:51:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:40,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:40,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062633313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:40,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:40,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 21 [2024-11-19 01:51:40,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896969607] [2024-11-19 01:51:40,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:40,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 01:51:40,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 01:51:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-19 01:51:40,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:40,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1186 transitions, 21684 flow. Second operand has 22 states, 22 states have (on average 6.5) internal successors, (143), 22 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:40,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:40,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:40,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:46,940 INFO L124 PetriNetUnfolderBase]: 15078/21393 cut-off events. [2024-11-19 01:51:46,941 INFO L125 PetriNetUnfolderBase]: For 332046/332046 co-relation queries the response was YES. [2024-11-19 01:51:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169139 conditions, 21393 events. 15078/21393 cut-off events. For 332046/332046 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 124594 event pairs, 1509 based on Foata normal form. 2/21395 useless extension candidates. Maximal degree in co-relation 168322. Up to 18733 conditions per place. [2024-11-19 01:51:47,310 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 1229 selfloop transitions, 229 changer transitions 1/1460 dead transitions. [2024-11-19 01:51:47,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1460 transitions, 29275 flow [2024-11-19 01:51:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:51:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:51:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 189 transitions. [2024-11-19 01:51:47,312 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-11-19 01:51:47,312 INFO L175 Difference]: Start difference. First operand has 238 places, 1186 transitions, 21684 flow. Second operand 14 states and 189 transitions. [2024-11-19 01:51:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1460 transitions, 29275 flow [2024-11-19 01:51:51,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1460 transitions, 27576 flow, removed 779 selfloop flow, removed 6 redundant places. [2024-11-19 01:51:51,368 INFO L231 Difference]: Finished difference. Result has 250 places, 1245 transitions, 21601 flow [2024-11-19 01:51:51,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=20177, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21601, PETRI_PLACES=250, PETRI_TRANSITIONS=1245} [2024-11-19 01:51:51,370 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 217 predicate places. [2024-11-19 01:51:51,370 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 1245 transitions, 21601 flow [2024-11-19 01:51:51,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.5) internal successors, (143), 22 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:51,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:51,370 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] [2024-11-19 01:51:51,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:51,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:51,571 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:51:51,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1478067514, now seen corresponding path program 3 times [2024-11-19 01:51:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:51,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931554806] [2024-11-19 01:51:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:51,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:51:51,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:51,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:51,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931554806] [2024-11-19 01:51:51,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931554806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:51,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667031883] [2024-11-19 01:51:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:51,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:51,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:51,833 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:51,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:51:51,915 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:51:51,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:51,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 01:51:51,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:52,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:52,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:52,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:51:52,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-11-19 01:51:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667031883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:52,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:52,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2024-11-19 01:51:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258341955] [2024-11-19 01:51:52,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:52,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:51:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:51:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:51:52,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:51:52,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1245 transitions, 21601 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:51:52,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:52,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:51:52,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:58,433 INFO L124 PetriNetUnfolderBase]: 16060/22791 cut-off events. [2024-11-19 01:51:58,433 INFO L125 PetriNetUnfolderBase]: For 347923/347923 co-relation queries the response was YES. [2024-11-19 01:51:58,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178841 conditions, 22791 events. 16060/22791 cut-off events. For 347923/347923 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 134289 event pairs, 1637 based on Foata normal form. 2/22793 useless extension candidates. Maximal degree in co-relation 178038. Up to 20395 conditions per place. [2024-11-19 01:51:58,848 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 1281 selfloop transitions, 220 changer transitions 1/1503 dead transitions. [2024-11-19 01:51:58,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1503 transitions, 28893 flow [2024-11-19 01:51:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:51:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:51:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 190 transitions. [2024-11-19 01:51:58,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47146401985111663 [2024-11-19 01:51:58,849 INFO L175 Difference]: Start difference. First operand has 250 places, 1245 transitions, 21601 flow. Second operand 13 states and 190 transitions. [2024-11-19 01:51:58,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1503 transitions, 28893 flow [2024-11-19 01:52:03,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1503 transitions, 28518 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-11-19 01:52:03,252 INFO L231 Difference]: Finished difference. Result has 260 places, 1302 transitions, 22866 flow [2024-11-19 01:52:03,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=21284, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22866, PETRI_PLACES=260, PETRI_TRANSITIONS=1302} [2024-11-19 01:52:03,253 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 227 predicate places. [2024-11-19 01:52:03,253 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 1302 transitions, 22866 flow [2024-11-19 01:52:03,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:03,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:52:03,254 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] [2024-11-19 01:52:03,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 01:52:03,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:03,455 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-19 01:52:03,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:52:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash -566900315, now seen corresponding path program 6 times [2024-11-19 01:52:03,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:52:03,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071089436] [2024-11-19 01:52:03,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:52:03,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:52:03,475 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:52:03,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:52:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:52:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071089436] [2024-11-19 01:52:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071089436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:52:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221826063] [2024-11-19 01:52:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:52:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:52:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:52:03,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:52:03,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:52:03,983 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:52:03,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:52:03,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 01:52:03,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:52:04,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 01:52:04,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:52:04,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-19 01:52:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:52:04,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:52:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:52:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221826063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:52:04,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:52:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 29 [2024-11-19 01:52:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954955119] [2024-11-19 01:52:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:52:04,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 01:52:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:52:04,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 01:52:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-19 01:52:04,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-19 01:52:04,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1302 transitions, 22866 flow. Second operand has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:52:04,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:52:04,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-19 01:52:04,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:52:12,260 INFO L124 PetriNetUnfolderBase]: 17228/24508 cut-off events. [2024-11-19 01:52:12,260 INFO L125 PetriNetUnfolderBase]: For 388169/388169 co-relation queries the response was YES. [2024-11-19 01:52:12,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195522 conditions, 24508 events. 17228/24508 cut-off events. For 388169/388169 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 146728 event pairs, 1473 based on Foata normal form. 1/24509 useless extension candidates. Maximal degree in co-relation 193761. Up to 20171 conditions per place. [2024-11-19 01:52:12,922 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 1230 selfloop transitions, 459 changer transitions 2/1692 dead transitions. [2024-11-19 01:52:12,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1692 transitions, 32000 flow [2024-11-19 01:52:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 01:52:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-19 01:52:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 278 transitions. [2024-11-19 01:52:12,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32027649769585254 [2024-11-19 01:52:12,924 INFO L175 Difference]: Start difference. First operand has 260 places, 1302 transitions, 22866 flow. Second operand 28 states and 278 transitions. [2024-11-19 01:52:12,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1692 transitions, 32000 flow