./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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-nonblocking-cntr-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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:49:09,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:49:09,453 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:49:09,459 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:49:09,460 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:49:09,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:49:09,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:49:09,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:49:09,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:49:09,488 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:49:09,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:49:09,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:49:09,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:49:09,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:49:09,490 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:49:09,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:49:09,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:49:09,491 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:49:09,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:49:09,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:49:09,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:49:09,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:49:09,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:49:09,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:49:09,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:49:09,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:49:09,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:49:09,499 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:49:09,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:49:09,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:49:09,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:49:09,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:49:09,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:49:09,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:49:09,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:49:09,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:49:09,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-11-09 02:49:09,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:49:09,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:49:09,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:49:09,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:49:09,726 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:49:09,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-09 02:49:10,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:49:11,152 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:49:11,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-09 02:49:11,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b3ba1d/90377b3a126244b29e5be43aad9a4d36/FLAG4ca081565 [2024-11-09 02:49:11,180 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b3ba1d/90377b3a126244b29e5be43aad9a4d36 [2024-11-09 02:49:11,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:49:11,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:49:11,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:49:11,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:49:11,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:49:11,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3351dff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11, skipping insertion in model container [2024-11-09 02:49:11,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,215 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:49:11,401 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-09 02:49:11,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:49:11,415 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:49:11,431 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-09 02:49:11,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:49:11,451 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:49:11,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11 WrapperNode [2024-11-09 02:49:11,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:49:11,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:49:11,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:49:11,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:49:11,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,484 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-11-09 02:49:11,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:49:11,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:49:11,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:49:11,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:49:11,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,513 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 02:49:11,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:49:11,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:49:11,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:49:11,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:49:11,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (1/1) ... [2024-11-09 02:49:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:49:11,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:11,576 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) [2024-11-09 02:49:11,580 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 [2024-11-09 02:49:11,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:49:11,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:49:11,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:49:11,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:49:11,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:49:11,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:49:11,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 02:49:11,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 02:49:11,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:49:11,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:49:11,627 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:49:11,701 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:49:11,702 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:49:11,834 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:49:11,834 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:49:12,004 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:49:12,005 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 02:49:12,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:49:12 BoogieIcfgContainer [2024-11-09 02:49:12,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:49:12,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:49:12,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:49:12,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:49:12,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:49:11" (1/3) ... [2024-11-09 02:49:12,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a778fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:49:12, skipping insertion in model container [2024-11-09 02:49:12,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:49:11" (2/3) ... [2024-11-09 02:49:12,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a778fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:49:12, skipping insertion in model container [2024-11-09 02:49:12,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:49:12" (3/3) ... [2024-11-09 02:49:12,014 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-11-09 02:49:12,027 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:49:12,028 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:49:12,029 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:49:12,065 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 02:49:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-09 02:49:12,109 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-09 02:49:12,109 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:49:12,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-09 02:49:12,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-09 02:49:12,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-09 02:49:12,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:49:12,130 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;@249f0088, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:49:12,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-09 02:49:12,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:49:12,137 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-09 02:49:12,137 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:49:12,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:12,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:12,139 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:12,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1126928125, now seen corresponding path program 1 times [2024-11-09 02:49:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:12,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449724837] [2024-11-09 02:49:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:12,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:12,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449724837] [2024-11-09 02:49:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449724837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:49:12,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:49:12,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:49:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699812380] [2024-11-09 02:49:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:49:12,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:49:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:49:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:49:12,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-09 02:49:12,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-09 02:49:12,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:12,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-09 02:49:12,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:12,517 INFO L124 PetriNetUnfolderBase]: 61/128 cut-off events. [2024-11-09 02:49:12,517 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 02:49:12,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 61/128 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 381 event pairs, 31 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 218. Up to 86 conditions per place. [2024-11-09 02:49:12,520 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-11-09 02:49:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-11-09 02:49:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:49:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:49:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-09 02:49:12,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-09 02:49:12,531 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-11-09 02:49:12,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-11-09 02:49:12,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 02:49:12,535 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-09 02:49:12,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-09 02:49:12,539 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-09 02:49:12,539 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-09 02:49:12,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-09 02:49:12,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:12,539 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:12,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:49:12,539 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:12,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1437000289, now seen corresponding path program 1 times [2024-11-09 02:49:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:12,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29210642] [2024-11-09 02:49:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:49:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29210642] [2024-11-09 02:49:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29210642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:49:12,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:49:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:49:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818069485] [2024-11-09 02:49:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:49:12,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:49:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:49:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:49:12,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-09 02:49:12,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 02:49:12,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:12,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-09 02:49:12,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:12,712 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2024-11-09 02:49:12,712 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-09 02:49:12,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 179 events. 89/179 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 598 event pairs, 37 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2024-11-09 02:49:12,715 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-11-09 02:49:12,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-11-09 02:49:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:49:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:49:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-09 02:49:12,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-09 02:49:12,716 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-11-09 02:49:12,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-11-09 02:49:12,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 02:49:12,718 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-09 02:49:12,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-09 02:49:12,719 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-09 02:49:12,719 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-09 02:49:12,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 02:49:12,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:12,720 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:12,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:49:12,720 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:12,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1087690981, now seen corresponding path program 1 times [2024-11-09 02:49:12,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:12,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414113416] [2024-11-09 02:49:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:12,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414113416] [2024-11-09 02:49:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414113416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794473117] [2024-11-09 02:49:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:13,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:13,145 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) [2024-11-09 02:49:13,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:49:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:13,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:13,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:13,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794473117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:14,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43968274] [2024-11-09 02:49:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:14,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:14,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:14,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:14,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:14,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:14,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:14,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:14,880 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-11-09 02:49:14,880 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-11-09 02:49:14,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 665 events. 387/665 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2625 event pairs, 23 based on Foata normal form. 14/679 useless extension candidates. Maximal degree in co-relation 595. Up to 218 conditions per place. [2024-11-09 02:49:14,889 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-11-09 02:49:14,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-11-09 02:49:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 02:49:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 02:49:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-11-09 02:49:14,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-11-09 02:49:14,895 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-11-09 02:49:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-11-09 02:49:14,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 02:49:14,900 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-11-09 02:49:14,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=504, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-11-09 02:49:14,903 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-11-09 02:49:14,904 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-11-09 02:49:14,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:14,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:14,904 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:14,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:15,105 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 [2024-11-09 02:49:15,107 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:15,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1244966769, now seen corresponding path program 2 times [2024-11-09 02:49:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782736496] [2024-11-09 02:49:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782736496] [2024-11-09 02:49:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782736496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596289569] [2024-11-09 02:49:15,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:49:15,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:15,306 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) [2024-11-09 02:49:15,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:49:15,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:49:15,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:15,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:15,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:15,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596289569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:15,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198192533] [2024-11-09 02:49:15,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:15,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:15,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:15,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:15,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:15,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:16,566 INFO L124 PetriNetUnfolderBase]: 573/1013 cut-off events. [2024-11-09 02:49:16,566 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-11-09 02:49:16,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 1013 events. 573/1013 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4701 event pairs, 35 based on Foata normal form. 2/1015 useless extension candidates. Maximal degree in co-relation 4191. Up to 290 conditions per place. [2024-11-09 02:49:16,574 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 104 selfloop transitions, 107 changer transitions 28/240 dead transitions. [2024-11-09 02:49:16,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 240 transitions, 1958 flow [2024-11-09 02:49:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 02:49:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 02:49:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 227 transitions. [2024-11-09 02:49:16,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-11-09 02:49:16,576 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 24 states and 227 transitions. [2024-11-09 02:49:16,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 240 transitions, 1958 flow [2024-11-09 02:49:16,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 240 transitions, 1936 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-09 02:49:16,596 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1431 flow [2024-11-09 02:49:16,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1431, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2024-11-09 02:49:16,597 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 79 predicate places. [2024-11-09 02:49:16,598 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1431 flow [2024-11-09 02:49:16,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:16,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:16,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:16,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 02:49:16,798 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 [2024-11-09 02:49:16,799 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:16,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash 253928195, now seen corresponding path program 3 times [2024-11-09 02:49:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597007451] [2024-11-09 02:49:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597007451] [2024-11-09 02:49:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597007451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902791783] [2024-11-09 02:49:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:49:16,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:16,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:16,992 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) [2024-11-09 02:49:16,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:49:17,033 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:49:17,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:17,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:17,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:17,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:17,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902791783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:17,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:17,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:17,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843306430] [2024-11-09 02:49:17,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:17,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:17,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:17,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:17,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:17,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 1431 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:17,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:17,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:17,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:18,454 INFO L124 PetriNetUnfolderBase]: 603/1072 cut-off events. [2024-11-09 02:49:18,455 INFO L125 PetriNetUnfolderBase]: For 5793/5793 co-relation queries the response was YES. [2024-11-09 02:49:18,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 1072 events. 603/1072 cut-off events. For 5793/5793 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5095 event pairs, 27 based on Foata normal form. 2/1074 useless extension candidates. Maximal degree in co-relation 5770. Up to 304 conditions per place. [2024-11-09 02:49:18,463 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 105 selfloop transitions, 139 changer transitions 21/266 dead transitions. [2024-11-09 02:49:18,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 266 transitions, 2879 flow [2024-11-09 02:49:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 02:49:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 02:49:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-11-09 02:49:18,466 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-11-09 02:49:18,466 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1431 flow. Second operand 28 states and 254 transitions. [2024-11-09 02:49:18,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 266 transitions, 2879 flow [2024-11-09 02:49:18,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 266 transitions, 2772 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-11-09 02:49:18,493 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2184 flow [2024-11-09 02:49:18,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2184, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-11-09 02:49:18,496 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2024-11-09 02:49:18,496 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2184 flow [2024-11-09 02:49:18,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:18,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:18,497 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:18,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:18,697 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 [2024-11-09 02:49:18,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:18,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1106845699, now seen corresponding path program 4 times [2024-11-09 02:49:18,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:18,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695853472] [2024-11-09 02:49:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:18,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:18,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695853472] [2024-11-09 02:49:18,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695853472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:18,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653613550] [2024-11-09 02:49:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:49:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:18,865 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) [2024-11-09 02:49:18,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:49:18,908 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:49:18,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:18,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 02:49:18,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:19,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:19,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653613550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:19,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:19,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-11-09 02:49:19,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862752578] [2024-11-09 02:49:19,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:19,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:19,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:19,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:19,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:19,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:19,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2184 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2024-11-09 02:49:19,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:19,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:19,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:20,773 INFO L124 PetriNetUnfolderBase]: 982/1749 cut-off events. [2024-11-09 02:49:20,773 INFO L125 PetriNetUnfolderBase]: For 14658/14658 co-relation queries the response was YES. [2024-11-09 02:49:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 1749 events. 982/1749 cut-off events. For 14658/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9256 event pairs, 28 based on Foata normal form. 4/1753 useless extension candidates. Maximal degree in co-relation 10972. Up to 511 conditions per place. [2024-11-09 02:49:20,792 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 183 selfloop transitions, 250 changer transitions 19/453 dead transitions. [2024-11-09 02:49:20,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 453 transitions, 6004 flow [2024-11-09 02:49:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 02:49:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-09 02:49:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 357 transitions. [2024-11-09 02:49:20,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-11-09 02:49:20,795 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2184 flow. Second operand 39 states and 357 transitions. [2024-11-09 02:49:20,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 453 transitions, 6004 flow [2024-11-09 02:49:20,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 453 transitions, 5524 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-11-09 02:49:20,871 INFO L231 Difference]: Finished difference. Result has 172 places, 324 transitions, 4614 flow [2024-11-09 02:49:20,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4614, PETRI_PLACES=172, PETRI_TRANSITIONS=324} [2024-11-09 02:49:20,872 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-11-09 02:49:20,872 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 324 transitions, 4614 flow [2024-11-09 02:49:20,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2024-11-09 02:49:20,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:20,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:20,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:21,076 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 [2024-11-09 02:49:21,077 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:21,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1094682093, now seen corresponding path program 5 times [2024-11-09 02:49:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:21,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276352545] [2024-11-09 02:49:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:21,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276352545] [2024-11-09 02:49:21,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276352545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859448585] [2024-11-09 02:49:21,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:49:21,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:21,249 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) [2024-11-09 02:49:21,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:49:21,285 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:49:21,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:21,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 02:49:21,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:21,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:21,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859448585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:21,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:21,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-11-09 02:49:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282683307] [2024-11-09 02:49:21,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:21,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:21,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:21,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 324 transitions, 4614 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-11-09 02:49:21,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:21,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:21,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:22,695 INFO L124 PetriNetUnfolderBase]: 1104/1944 cut-off events. [2024-11-09 02:49:22,696 INFO L125 PetriNetUnfolderBase]: For 20936/20936 co-relation queries the response was YES. [2024-11-09 02:49:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13794 conditions, 1944 events. 1104/1944 cut-off events. For 20936/20936 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10435 event pairs, 41 based on Foata normal form. 2/1946 useless extension candidates. Maximal degree in co-relation 13641. Up to 751 conditions per place. [2024-11-09 02:49:22,712 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 204 selfloop transitions, 256 changer transitions 24/485 dead transitions. [2024-11-09 02:49:22,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 485 transitions, 7420 flow [2024-11-09 02:49:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 02:49:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-09 02:49:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 305 transitions. [2024-11-09 02:49:22,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-11-09 02:49:22,714 INFO L175 Difference]: Start difference. First operand has 172 places, 324 transitions, 4614 flow. Second operand 35 states and 305 transitions. [2024-11-09 02:49:22,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 485 transitions, 7420 flow [2024-11-09 02:49:22,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 485 transitions, 6431 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-11-09 02:49:22,842 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 5574 flow [2024-11-09 02:49:22,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5574, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-11-09 02:49:22,843 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2024-11-09 02:49:22,843 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 5574 flow [2024-11-09 02:49:22,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 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) [2024-11-09 02:49:22,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:22,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:22,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:49:23,047 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 [2024-11-09 02:49:23,049 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:23,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:23,049 INFO L85 PathProgramCache]: Analyzing trace with hash 691254019, now seen corresponding path program 6 times [2024-11-09 02:49:23,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:23,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440434676] [2024-11-09 02:49:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440434676] [2024-11-09 02:49:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440434676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27828326] [2024-11-09 02:49:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:49:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:23,201 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) [2024-11-09 02:49:23,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:49:23,235 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-09 02:49:23,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:23,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:23,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:23,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27828326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:23,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279384135] [2024-11-09 02:49:23,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:23,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:23,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:23,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 5574 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:23,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:23,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:23,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:24,589 INFO L124 PetriNetUnfolderBase]: 1225/2178 cut-off events. [2024-11-09 02:49:24,589 INFO L125 PetriNetUnfolderBase]: For 20738/20738 co-relation queries the response was YES. [2024-11-09 02:49:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2178 events. 1225/2178 cut-off events. For 20738/20738 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12176 event pairs, 36 based on Foata normal form. 13/2191 useless extension candidates. Maximal degree in co-relation 15168. Up to 974 conditions per place. [2024-11-09 02:49:24,607 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 220 selfloop transitions, 276 changer transitions 30/527 dead transitions. [2024-11-09 02:49:24,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 527 transitions, 8436 flow [2024-11-09 02:49:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 02:49:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 02:49:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2024-11-09 02:49:24,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2024-11-09 02:49:24,608 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 5574 flow. Second operand 23 states and 205 transitions. [2024-11-09 02:49:24,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 527 transitions, 8436 flow [2024-11-09 02:49:24,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 527 transitions, 8230 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-11-09 02:49:24,748 INFO L231 Difference]: Finished difference. Result has 221 places, 442 transitions, 7609 flow [2024-11-09 02:49:24,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7609, PETRI_PLACES=221, PETRI_TRANSITIONS=442} [2024-11-09 02:49:24,749 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-11-09 02:49:24,749 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 442 transitions, 7609 flow [2024-11-09 02:49:24,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:24,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:24,750 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:24,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 02:49:24,951 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 [2024-11-09 02:49:24,952 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:24,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1544171523, now seen corresponding path program 7 times [2024-11-09 02:49:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836257341] [2024-11-09 02:49:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:25,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:25,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836257341] [2024-11-09 02:49:25,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836257341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:25,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623100457] [2024-11-09 02:49:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 02:49:25,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:25,103 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) [2024-11-09 02:49:25,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 02:49:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:25,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:25,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:25,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623100457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:25,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:25,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771312189] [2024-11-09 02:49:25,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:25,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:25,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:25,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:25,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 442 transitions, 7609 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:25,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:25,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:25,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:26,556 INFO L124 PetriNetUnfolderBase]: 1291/2280 cut-off events. [2024-11-09 02:49:26,556 INFO L125 PetriNetUnfolderBase]: For 28931/28931 co-relation queries the response was YES. [2024-11-09 02:49:26,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17865 conditions, 2280 events. 1291/2280 cut-off events. For 28931/28931 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12712 event pairs, 27 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 17694. Up to 1028 conditions per place. [2024-11-09 02:49:26,574 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 232 selfloop transitions, 335 changer transitions 21/589 dead transitions. [2024-11-09 02:49:26,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 589 transitions, 10730 flow [2024-11-09 02:49:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 02:49:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 02:49:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 223 transitions. [2024-11-09 02:49:26,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3932980599647266 [2024-11-09 02:49:26,576 INFO L175 Difference]: Start difference. First operand has 221 places, 442 transitions, 7609 flow. Second operand 27 states and 223 transitions. [2024-11-09 02:49:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 589 transitions, 10730 flow [2024-11-09 02:49:26,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 589 transitions, 10506 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-11-09 02:49:26,801 INFO L231 Difference]: Finished difference. Result has 248 places, 516 transitions, 10031 flow [2024-11-09 02:49:26,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10031, PETRI_PLACES=248, PETRI_TRANSITIONS=516} [2024-11-09 02:49:26,802 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2024-11-09 02:49:26,802 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 516 transitions, 10031 flow [2024-11-09 02:49:26,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:26,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:26,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:26,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 02:49:27,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:27,007 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:27,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1247042307, now seen corresponding path program 8 times [2024-11-09 02:49:27,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:27,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022220120] [2024-11-09 02:49:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:27,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022220120] [2024-11-09 02:49:27,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022220120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075967880] [2024-11-09 02:49:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:49:27,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:27,139 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) [2024-11-09 02:49:27,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 02:49:27,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:49:27,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:27,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:27,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:27,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075967880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:27,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:27,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092459747] [2024-11-09 02:49:27,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:27,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:27,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:27,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 516 transitions, 10031 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:27,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:27,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:27,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:28,433 INFO L124 PetriNetUnfolderBase]: 1280/2246 cut-off events. [2024-11-09 02:49:28,433 INFO L125 PetriNetUnfolderBase]: For 33603/33603 co-relation queries the response was YES. [2024-11-09 02:49:28,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19632 conditions, 2246 events. 1280/2246 cut-off events. For 33603/33603 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12253 event pairs, 31 based on Foata normal form. 7/2253 useless extension candidates. Maximal degree in co-relation 19482. Up to 1012 conditions per place. [2024-11-09 02:49:28,454 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 259 selfloop transitions, 313 changer transitions 26/599 dead transitions. [2024-11-09 02:49:28,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 599 transitions, 12291 flow [2024-11-09 02:49:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 02:49:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 02:49:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 191 transitions. [2024-11-09 02:49:28,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4331065759637188 [2024-11-09 02:49:28,456 INFO L175 Difference]: Start difference. First operand has 248 places, 516 transitions, 10031 flow. Second operand 21 states and 191 transitions. [2024-11-09 02:49:28,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 599 transitions, 12291 flow [2024-11-09 02:49:28,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 599 transitions, 12043 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-11-09 02:49:28,761 INFO L231 Difference]: Finished difference. Result has 265 places, 529 transitions, 11431 flow [2024-11-09 02:49:28,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9786, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11431, PETRI_PLACES=265, PETRI_TRANSITIONS=529} [2024-11-09 02:49:28,762 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 242 predicate places. [2024-11-09 02:49:28,762 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 529 transitions, 11431 flow [2024-11-09 02:49:28,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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) [2024-11-09 02:49:28,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:28,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:28,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:28,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 02:49:28,963 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:28,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2099959811, now seen corresponding path program 9 times [2024-11-09 02:49:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130785342] [2024-11-09 02:49:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:29,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130785342] [2024-11-09 02:49:29,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130785342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042002534] [2024-11-09 02:49:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:49:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:29,120 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) [2024-11-09 02:49:29,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 02:49:29,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:49:29,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:29,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:29,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:29,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:29,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042002534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:29,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:29,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 02:49:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025563372] [2024-11-09 02:49:29,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:29,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 02:49:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 02:49:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-11-09 02:49:29,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:29,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 529 transitions, 11431 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:29,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:29,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:29,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:30,733 INFO L124 PetriNetUnfolderBase]: 1306/2297 cut-off events. [2024-11-09 02:49:30,733 INFO L125 PetriNetUnfolderBase]: For 40668/40668 co-relation queries the response was YES. [2024-11-09 02:49:30,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 2297 events. 1306/2297 cut-off events. For 40668/40668 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12621 event pairs, 28 based on Foata normal form. 2/2299 useless extension candidates. Maximal degree in co-relation 21463. Up to 1024 conditions per place. [2024-11-09 02:49:30,757 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 261 selfloop transitions, 378 changer transitions 18/658 dead transitions. [2024-11-09 02:49:30,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 658 transitions, 14505 flow [2024-11-09 02:49:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 02:49:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 02:49:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2024-11-09 02:49:30,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39105339105339104 [2024-11-09 02:49:30,762 INFO L175 Difference]: Start difference. First operand has 265 places, 529 transitions, 11431 flow. Second operand 33 states and 271 transitions. [2024-11-09 02:49:30,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 658 transitions, 14505 flow [2024-11-09 02:49:31,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 658 transitions, 14324 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-11-09 02:49:31,097 INFO L231 Difference]: Finished difference. Result has 292 places, 585 transitions, 13921 flow [2024-11-09 02:49:31,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11294, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13921, PETRI_PLACES=292, PETRI_TRANSITIONS=585} [2024-11-09 02:49:31,098 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 269 predicate places. [2024-11-09 02:49:31,099 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 585 transitions, 13921 flow [2024-11-09 02:49:31,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-11-09 02:49:31,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:31,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:31,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:31,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:31,299 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:31,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -492124575, now seen corresponding path program 10 times [2024-11-09 02:49:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:31,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760287423] [2024-11-09 02:49:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:31,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760287423] [2024-11-09 02:49:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760287423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33540267] [2024-11-09 02:49:31,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:49:31,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:31,462 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) [2024-11-09 02:49:31,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 02:49:31,510 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:49:31,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:31,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 02:49:31,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:31,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33540267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:31,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:31,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-11-09 02:49:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575140887] [2024-11-09 02:49:31,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:31,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 02:49:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:31,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 02:49:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-09 02:49:31,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:31,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 585 transitions, 13921 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-11-09 02:49:31,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:31,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:31,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:32,880 INFO L124 PetriNetUnfolderBase]: 1322/2324 cut-off events. [2024-11-09 02:49:32,881 INFO L125 PetriNetUnfolderBase]: For 49267/49267 co-relation queries the response was YES. [2024-11-09 02:49:32,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23858 conditions, 2324 events. 1322/2324 cut-off events. For 49267/49267 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12756 event pairs, 18 based on Foata normal form. 1/2325 useless extension candidates. Maximal degree in co-relation 23664. Up to 1071 conditions per place. [2024-11-09 02:49:32,902 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 210 selfloop transitions, 443 changer transitions 5/659 dead transitions. [2024-11-09 02:49:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 659 transitions, 16265 flow [2024-11-09 02:49:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 02:49:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 02:49:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 185 transitions. [2024-11-09 02:49:32,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3830227743271222 [2024-11-09 02:49:32,904 INFO L175 Difference]: Start difference. First operand has 292 places, 585 transitions, 13921 flow. Second operand 23 states and 185 transitions. [2024-11-09 02:49:32,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 659 transitions, 16265 flow [2024-11-09 02:49:33,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 659 transitions, 15873 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-11-09 02:49:33,285 INFO L231 Difference]: Finished difference. Result has 298 places, 604 transitions, 15119 flow [2024-11-09 02:49:33,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15119, PETRI_PLACES=298, PETRI_TRANSITIONS=604} [2024-11-09 02:49:33,286 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 275 predicate places. [2024-11-09 02:49:33,286 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 604 transitions, 15119 flow [2024-11-09 02:49:33,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-11-09 02:49:33,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:33,286 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:33,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:33,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 02:49:33,487 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:33,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -185650157, now seen corresponding path program 11 times [2024-11-09 02:49:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:33,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776367034] [2024-11-09 02:49:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:33,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776367034] [2024-11-09 02:49:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776367034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:33,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894482870] [2024-11-09 02:49:33,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:49:33,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:33,650 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) [2024-11-09 02:49:33,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 02:49:33,689 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 02:49:33,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:33,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:49:33,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:33,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:34,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894482870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:34,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:34,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:49:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532919461] [2024-11-09 02:49:34,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:34,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:49:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:49:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:49:34,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:34,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 604 transitions, 15119 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:49:34,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:34,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:34,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:36,855 INFO L124 PetriNetUnfolderBase]: 1822/3287 cut-off events. [2024-11-09 02:49:36,856 INFO L125 PetriNetUnfolderBase]: For 79679/79679 co-relation queries the response was YES. [2024-11-09 02:49:36,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 3287 events. 1822/3287 cut-off events. For 79679/79679 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19556 event pairs, 63 based on Foata normal form. 5/3292 useless extension candidates. Maximal degree in co-relation 35247. Up to 1050 conditions per place. [2024-11-09 02:49:36,902 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 403 selfloop transitions, 557 changer transitions 29/990 dead transitions. [2024-11-09 02:49:36,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 990 transitions, 24616 flow [2024-11-09 02:49:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 02:49:36,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-09 02:49:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 549 transitions. [2024-11-09 02:49:36,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-11-09 02:49:36,904 INFO L175 Difference]: Start difference. First operand has 298 places, 604 transitions, 15119 flow. Second operand 63 states and 549 transitions. [2024-11-09 02:49:36,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 990 transitions, 24616 flow [2024-11-09 02:49:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 990 transitions, 24396 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-11-09 02:49:37,540 INFO L231 Difference]: Finished difference. Result has 363 places, 780 transitions, 21984 flow [2024-11-09 02:49:37,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14919, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21984, PETRI_PLACES=363, PETRI_TRANSITIONS=780} [2024-11-09 02:49:37,541 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2024-11-09 02:49:37,541 INFO L471 AbstractCegarLoop]: Abstraction has has 363 places, 780 transitions, 21984 flow [2024-11-09 02:49:37,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:49:37,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:37,542 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:37,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 02:49:37,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 02:49:37,742 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:37,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 331302923, now seen corresponding path program 12 times [2024-11-09 02:49:37,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:37,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167370574] [2024-11-09 02:49:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:37,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:37,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167370574] [2024-11-09 02:49:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167370574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680320880] [2024-11-09 02:49:37,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:49:37,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:37,910 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) [2024-11-09 02:49:37,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 02:49:37,944 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 02:49:37,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:37,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:49:37,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:38,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680320880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:38,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:38,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:49:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965450062] [2024-11-09 02:49:38,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:38,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:49:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:49:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:49:38,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:38,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 780 transitions, 21984 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:49:38,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:38,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:38,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:41,976 INFO L124 PetriNetUnfolderBase]: 2049/3687 cut-off events. [2024-11-09 02:49:41,977 INFO L125 PetriNetUnfolderBase]: For 113661/113661 co-relation queries the response was YES. [2024-11-09 02:49:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43869 conditions, 3687 events. 2049/3687 cut-off events. For 113661/113661 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 22530 event pairs, 41 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 43755. Up to 1157 conditions per place. [2024-11-09 02:49:42,020 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 375 selfloop transitions, 708 changer transitions 29/1113 dead transitions. [2024-11-09 02:49:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1113 transitions, 30503 flow [2024-11-09 02:49:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-09 02:49:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-11-09 02:49:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 660 transitions. [2024-11-09 02:49:42,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39783001808318263 [2024-11-09 02:49:42,022 INFO L175 Difference]: Start difference. First operand has 363 places, 780 transitions, 21984 flow. Second operand 79 states and 660 transitions. [2024-11-09 02:49:42,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1113 transitions, 30503 flow [2024-11-09 02:49:43,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1113 transitions, 29923 flow, removed 184 selfloop flow, removed 13 redundant places. [2024-11-09 02:49:43,252 INFO L231 Difference]: Finished difference. Result has 445 places, 910 transitions, 27628 flow [2024-11-09 02:49:43,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21560, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27628, PETRI_PLACES=445, PETRI_TRANSITIONS=910} [2024-11-09 02:49:43,254 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-11-09 02:49:43,254 INFO L471 AbstractCegarLoop]: Abstraction has has 445 places, 910 transitions, 27628 flow [2024-11-09 02:49:43,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:49:43,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:43,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:43,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 02:49:43,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 02:49:43,455 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:43,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 171951597, now seen corresponding path program 13 times [2024-11-09 02:49:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:43,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567912184] [2024-11-09 02:49:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:43,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567912184] [2024-11-09 02:49:43,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567912184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:43,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395731056] [2024-11-09 02:49:43,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 02:49:43,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:43,641 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) [2024-11-09 02:49:43,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 02:49:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:43,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:49:43,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:43,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395731056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:44,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:44,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:49:44,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623207911] [2024-11-09 02:49:44,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:44,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:49:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:49:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:49:44,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:44,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 910 transitions, 27628 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:49:44,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:44,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:44,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:49,051 INFO L124 PetriNetUnfolderBase]: 2324/4200 cut-off events. [2024-11-09 02:49:49,051 INFO L125 PetriNetUnfolderBase]: For 153926/153926 co-relation queries the response was YES. [2024-11-09 02:49:49,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53253 conditions, 4200 events. 2324/4200 cut-off events. For 153926/153926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26552 event pairs, 44 based on Foata normal form. 6/4206 useless extension candidates. Maximal degree in co-relation 52800. Up to 1310 conditions per place. [2024-11-09 02:49:49,105 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 418 selfloop transitions, 853 changer transitions 29/1301 dead transitions. [2024-11-09 02:49:49,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1301 transitions, 38012 flow [2024-11-09 02:49:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-09 02:49:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-11-09 02:49:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 897 transitions. [2024-11-09 02:49:49,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3780025284450063 [2024-11-09 02:49:49,108 INFO L175 Difference]: Start difference. First operand has 445 places, 910 transitions, 27628 flow. Second operand 113 states and 897 transitions. [2024-11-09 02:49:49,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1301 transitions, 38012 flow [2024-11-09 02:49:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1301 transitions, 37187 flow, removed 147 selfloop flow, removed 29 redundant places. [2024-11-09 02:49:50,851 INFO L231 Difference]: Finished difference. Result has 539 places, 1059 transitions, 34027 flow [2024-11-09 02:49:50,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26933, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=34027, PETRI_PLACES=539, PETRI_TRANSITIONS=1059} [2024-11-09 02:49:50,852 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2024-11-09 02:49:50,852 INFO L471 AbstractCegarLoop]: Abstraction has has 539 places, 1059 transitions, 34027 flow [2024-11-09 02:49:50,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:49:50,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:50,853 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:50,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 02:49:51,053 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,SelfDestructingSolverStorable14 [2024-11-09 02:49:51,053 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:51,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1921420705, now seen corresponding path program 14 times [2024-11-09 02:49:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:51,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179772472] [2024-11-09 02:49:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:51,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:51,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:51,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179772472] [2024-11-09 02:49:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179772472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695067888] [2024-11-09 02:49:51,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:49:51,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:51,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:51,223 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) [2024-11-09 02:49:51,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 02:49:51,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:49:51,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:51,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:49:51,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:49:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:51,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:49:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:51,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695067888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:49:51,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:49:51,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:49:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727086489] [2024-11-09 02:49:51,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:49:51,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:49:51,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:49:51,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:49:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:49:51,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:49:51,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1059 transitions, 34027 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:49:51,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:49:51,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:49:51,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:49:56,033 INFO L124 PetriNetUnfolderBase]: 2801/5033 cut-off events. [2024-11-09 02:49:56,034 INFO L125 PetriNetUnfolderBase]: For 214856/214856 co-relation queries the response was YES. [2024-11-09 02:49:56,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68773 conditions, 5033 events. 2801/5033 cut-off events. For 214856/214856 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33037 event pairs, 71 based on Foata normal form. 5/5038 useless extension candidates. Maximal degree in co-relation 68241. Up to 1587 conditions per place. [2024-11-09 02:49:56,108 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 484 selfloop transitions, 1027 changer transitions 19/1531 dead transitions. [2024-11-09 02:49:56,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1531 transitions, 49581 flow [2024-11-09 02:49:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-09 02:49:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-09 02:49:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 715 transitions. [2024-11-09 02:49:56,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3959025470653378 [2024-11-09 02:49:56,110 INFO L175 Difference]: Start difference. First operand has 539 places, 1059 transitions, 34027 flow. Second operand 86 states and 715 transitions. [2024-11-09 02:49:56,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1531 transitions, 49581 flow [2024-11-09 02:49:59,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1531 transitions, 47276 flow, removed 714 selfloop flow, removed 57 redundant places. [2024-11-09 02:49:59,354 INFO L231 Difference]: Finished difference. Result has 592 places, 1325 transitions, 45080 flow [2024-11-09 02:49:59,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32513, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=45080, PETRI_PLACES=592, PETRI_TRANSITIONS=1325} [2024-11-09 02:49:59,355 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2024-11-09 02:49:59,355 INFO L471 AbstractCegarLoop]: Abstraction has has 592 places, 1325 transitions, 45080 flow [2024-11-09 02:49:59,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:49:59,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:49:59,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:49:59,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 02:49:59,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:59,561 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:49:59,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:49:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash -105111933, now seen corresponding path program 15 times [2024-11-09 02:49:59,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:49:59,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216253479] [2024-11-09 02:49:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:49:59,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:49:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:49:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:49:59,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:49:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216253479] [2024-11-09 02:49:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216253479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:49:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876724635] [2024-11-09 02:49:59,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:49:59,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:49:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:49:59,748 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) [2024-11-09 02:49:59,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 02:49:59,784 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 02:49:59,784 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:49:59,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:49:59,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:00,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876724635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:00,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:50:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464038680] [2024-11-09 02:50:00,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:00,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:50:00,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:50:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:50:00,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:50:00,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1325 transitions, 45080 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:50:00,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:00,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:50:00,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:04,820 INFO L124 PetriNetUnfolderBase]: 3191/5728 cut-off events. [2024-11-09 02:50:04,820 INFO L125 PetriNetUnfolderBase]: For 286657/286657 co-relation queries the response was YES. [2024-11-09 02:50:04,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81377 conditions, 5728 events. 3191/5728 cut-off events. For 286657/286657 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38682 event pairs, 87 based on Foata normal form. 4/5732 useless extension candidates. Maximal degree in co-relation 80878. Up to 2498 conditions per place. [2024-11-09 02:50:04,905 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 630 selfloop transitions, 1009 changer transitions 25/1665 dead transitions. [2024-11-09 02:50:04,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1665 transitions, 56987 flow [2024-11-09 02:50:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-09 02:50:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-09 02:50:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 565 transitions. [2024-11-09 02:50:04,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-11-09 02:50:04,906 INFO L175 Difference]: Start difference. First operand has 592 places, 1325 transitions, 45080 flow. Second operand 70 states and 565 transitions. [2024-11-09 02:50:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1665 transitions, 56987 flow [2024-11-09 02:50:09,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1665 transitions, 56007 flow, removed 245 selfloop flow, removed 20 redundant places. [2024-11-09 02:50:09,402 INFO L231 Difference]: Finished difference. Result has 672 places, 1507 transitions, 54821 flow [2024-11-09 02:50:09,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44206, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=54821, PETRI_PLACES=672, PETRI_TRANSITIONS=1507} [2024-11-09 02:50:09,403 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2024-11-09 02:50:09,403 INFO L471 AbstractCegarLoop]: Abstraction has has 672 places, 1507 transitions, 54821 flow [2024-11-09 02:50:09,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:50:09,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:09,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:09,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 02:50:09,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 02:50:09,604 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:50:09,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 209949993, now seen corresponding path program 16 times [2024-11-09 02:50:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:09,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180547580] [2024-11-09 02:50:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180547580] [2024-11-09 02:50:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180547580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339151606] [2024-11-09 02:50:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:50:09,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:09,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:09,784 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) [2024-11-09 02:50:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 02:50:09,823 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:50:09,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:09,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:50:09,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:10,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:10,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339151606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:10,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:10,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:50:10,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807545675] [2024-11-09 02:50:10,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:10,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:50:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:50:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:50:10,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:50:10,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1507 transitions, 54821 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:50:10,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:10,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:50:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:15,992 INFO L124 PetriNetUnfolderBase]: 3477/6276 cut-off events. [2024-11-09 02:50:15,992 INFO L125 PetriNetUnfolderBase]: For 384671/384671 co-relation queries the response was YES. [2024-11-09 02:50:16,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94639 conditions, 6276 events. 3477/6276 cut-off events. For 384671/384671 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 43487 event pairs, 89 based on Foata normal form. 6/6282 useless extension candidates. Maximal degree in co-relation 94123. Up to 2396 conditions per place. [2024-11-09 02:50:16,114 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 615 selfloop transitions, 1217 changer transitions 20/1853 dead transitions. [2024-11-09 02:50:16,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1853 transitions, 67069 flow [2024-11-09 02:50:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-09 02:50:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-11-09 02:50:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 667 transitions. [2024-11-09 02:50:16,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3873403019744483 [2024-11-09 02:50:16,116 INFO L175 Difference]: Start difference. First operand has 672 places, 1507 transitions, 54821 flow. Second operand 82 states and 667 transitions. [2024-11-09 02:50:16,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1853 transitions, 67069 flow [2024-11-09 02:50:21,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1853 transitions, 66739 flow, removed 84 selfloop flow, removed 20 redundant places. [2024-11-09 02:50:21,686 INFO L231 Difference]: Finished difference. Result has 754 places, 1659 transitions, 64996 flow [2024-11-09 02:50:21,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54577, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=64996, PETRI_PLACES=754, PETRI_TRANSITIONS=1659} [2024-11-09 02:50:21,688 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 731 predicate places. [2024-11-09 02:50:21,688 INFO L471 AbstractCegarLoop]: Abstraction has has 754 places, 1659 transitions, 64996 flow [2024-11-09 02:50:21,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:50:21,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:21,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:21,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 02:50:21,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 02:50:21,893 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:50:21,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash 76784223, now seen corresponding path program 17 times [2024-11-09 02:50:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849381957] [2024-11-09 02:50:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:22,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849381957] [2024-11-09 02:50:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849381957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123600602] [2024-11-09 02:50:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:50:22,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:22,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:22,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 02:50:22,135 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 02:50:22,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:22,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:50:22,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:22,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123600602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:22,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:22,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:50:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895975858] [2024-11-09 02:50:22,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:22,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:50:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:50:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:50:22,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:50:22,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1659 transitions, 64996 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:50:22,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:22,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:50:22,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:29,280 INFO L124 PetriNetUnfolderBase]: 3494/6298 cut-off events. [2024-11-09 02:50:29,280 INFO L125 PetriNetUnfolderBase]: For 424164/424164 co-relation queries the response was YES. [2024-11-09 02:50:29,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100911 conditions, 6298 events. 3494/6298 cut-off events. For 424164/424164 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43556 event pairs, 92 based on Foata normal form. 5/6303 useless extension candidates. Maximal degree in co-relation 100361. Up to 2423 conditions per place. [2024-11-09 02:50:29,394 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 638 selfloop transitions, 1200 changer transitions 27/1866 dead transitions. [2024-11-09 02:50:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 1866 transitions, 71754 flow [2024-11-09 02:50:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-09 02:50:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-11-09 02:50:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 748 transitions. [2024-11-09 02:50:29,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36720667648502703 [2024-11-09 02:50:29,396 INFO L175 Difference]: Start difference. First operand has 754 places, 1659 transitions, 64996 flow. Second operand 97 states and 748 transitions. [2024-11-09 02:50:29,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 1866 transitions, 71754 flow [2024-11-09 02:50:36,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 1866 transitions, 70277 flow, removed 536 selfloop flow, removed 38 redundant places. [2024-11-09 02:50:36,828 INFO L231 Difference]: Finished difference. Result has 816 places, 1683 transitions, 67842 flow [2024-11-09 02:50:36,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=63625, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=67842, PETRI_PLACES=816, PETRI_TRANSITIONS=1683} [2024-11-09 02:50:36,830 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 793 predicate places. [2024-11-09 02:50:36,830 INFO L471 AbstractCegarLoop]: Abstraction has has 816 places, 1683 transitions, 67842 flow [2024-11-09 02:50:36,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 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) [2024-11-09 02:50:36,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:50:36,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:50:36,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 02:50:37,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:37,032 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:50:37,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:50:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1879233675, now seen corresponding path program 18 times [2024-11-09 02:50:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:50:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322387600] [2024-11-09 02:50:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:50:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:50:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:50:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:50:37,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322387600] [2024-11-09 02:50:37,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322387600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:50:37,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848936779] [2024-11-09 02:50:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:50:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:50:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:50:37,172 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:50:37,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 02:50:37,204 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 02:50:37,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:50:37,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 02:50:37,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:50:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:37,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:50:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:50:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848936779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:50:37,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:50:37,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-09 02:50:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955696947] [2024-11-09 02:50:37,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:50:37,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 02:50:37,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:50:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 02:50:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 02:50:37,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-09 02:50:37,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 1683 transitions, 67842 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 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) [2024-11-09 02:50:37,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:50:37,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-09 02:50:37,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:50:42,837 INFO L124 PetriNetUnfolderBase]: 3795/6850 cut-off events. [2024-11-09 02:50:42,837 INFO L125 PetriNetUnfolderBase]: For 430179/430179 co-relation queries the response was YES. [2024-11-09 02:50:43,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110053 conditions, 6850 events. 3795/6850 cut-off events. For 430179/430179 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48448 event pairs, 125 based on Foata normal form. 7/6857 useless extension candidates. Maximal degree in co-relation 109631. Up to 3431 conditions per place. [2024-11-09 02:50:43,078 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 728 selfloop transitions, 1243 changer transitions 19/1991 dead transitions. [2024-11-09 02:50:43,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 1991 transitions, 79236 flow [2024-11-09 02:50:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-09 02:50:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-11-09 02:50:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 503 transitions. [2024-11-09 02:50:43,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3742559523809524 [2024-11-09 02:50:43,080 INFO L175 Difference]: Start difference. First operand has 816 places, 1683 transitions, 67842 flow. Second operand 64 states and 503 transitions. [2024-11-09 02:50:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 1991 transitions, 79236 flow