./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB --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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:28:09,226 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:28:09,351 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:28:09,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:28:09,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:28:09,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:28:09,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:28:09,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:28:09,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:28:09,413 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:28:09,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:28:09,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:28:09,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:28:09,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:28:09,416 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:28:09,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:28:09,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:28:09,417 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:28:09,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:28:09,418 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:28:09,419 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:28:09,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:09,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:09,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:28:09,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:28:09,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:28:09,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:28:09,422 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:28:09,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:28:09,423 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-27 20:28:09,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:28:09,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:28:09,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:28:09,822 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:28:09,822 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:28:09,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-27 20:28:13,491 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/304f1231c/8876fd5e6dfa4be5b645830d3d444e49/FLAG751206fb3 [2024-11-27 20:28:13,823 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:28:13,825 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-27 20:28:13,840 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/304f1231c/8876fd5e6dfa4be5b645830d3d444e49/FLAG751206fb3 [2024-11-27 20:28:13,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/304f1231c/8876fd5e6dfa4be5b645830d3d444e49 [2024-11-27 20:28:13,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:28:13,874 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:28:13,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:28:13,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:28:13,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:28:13,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:28:13" (1/1) ... [2024-11-27 20:28:13,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b368aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:13, skipping insertion in model container [2024-11-27 20:28:13,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:28:13" (1/1) ... [2024-11-27 20:28:13,918 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:28:14,204 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-11-27 20:28:14,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:28:14,239 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:28:14,275 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-11-27 20:28:14,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:28:14,299 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:28:14,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14 WrapperNode [2024-11-27 20:28:14,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:28:14,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:28:14,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:28:14,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:28:14,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,366 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 265 [2024-11-27 20:28:14,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:28:14,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:28:14,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:28:14,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:28:14,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,384 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,410 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-27 20:28:14,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,433 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:28:14,458 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:28:14,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:28:14,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:28:14,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (1/1) ... [2024-11-27 20:28:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:28:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:14,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:28:14,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:28:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:28:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:28:14,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:28:14,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 20:28:14,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:28:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:28:14,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:28:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:28:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:28:14,543 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:28:14,710 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:28:14,714 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:28:15,375 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:28:15,376 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:28:16,022 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:28:16,023 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 20:28:16,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:28:16 BoogieIcfgContainer [2024-11-27 20:28:16,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:28:16,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:28:16,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:28:16,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:28:16,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:28:13" (1/3) ... [2024-11-27 20:28:16,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755bc1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:28:16, skipping insertion in model container [2024-11-27 20:28:16,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:28:14" (2/3) ... [2024-11-27 20:28:16,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755bc1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:28:16, skipping insertion in model container [2024-11-27 20:28:16,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:28:16" (3/3) ... [2024-11-27 20:28:16,037 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-27 20:28:16,055 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:28:16,057 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 20:28:16,057 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:28:16,211 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:28:16,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 20:28:16,324 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-27 20:28:16,327 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:28:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-27 20:28:16,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 20:28:16,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-27 20:28:16,356 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:28:16,379 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;@268ce915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:28:16,381 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 20:28:16,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:28:16,403 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-27 20:28:16,405 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:28:16,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:16,407 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:16,408 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:16,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash 50069996, now seen corresponding path program 1 times [2024-11-27 20:28:16,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:16,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692479042] [2024-11-27 20:28:16,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:28:17,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:17,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692479042] [2024-11-27 20:28:17,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692479042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:17,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:17,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:28:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128624833] [2024-11-27 20:28:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:17,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:28:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:17,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:28:17,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:28:17,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:17,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:28:17,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:17,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:17,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:17,901 INFO L124 PetriNetUnfolderBase]: 341/503 cut-off events. [2024-11-27 20:28:17,901 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-27 20:28:17,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 503 events. 341/503 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1509 event pairs, 124 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 890. Up to 299 conditions per place. [2024-11-27 20:28:17,915 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 36 selfloop transitions, 2 changer transitions 4/43 dead transitions. [2024-11-27 20:28:17,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 203 flow [2024-11-27 20:28:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:28:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:28:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-27 20:28:17,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-11-27 20:28:17,937 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 55 transitions. [2024-11-27 20:28:17,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 203 flow [2024-11-27 20:28:17,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:28:17,955 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 72 flow [2024-11-27 20:28:17,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-11-27 20:28:17,964 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-27 20:28:17,965 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 72 flow [2024-11-27 20:28:17,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:28:17,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:17,965 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:17,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:28:17,968 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:17,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 880343861, now seen corresponding path program 1 times [2024-11-27 20:28:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:17,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542653576] [2024-11-27 20:28:17,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:28:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542653576] [2024-11-27 20:28:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542653576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:18,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:18,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:28:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094578282] [2024-11-27 20:28:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:18,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:28:18,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:18,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:28:18,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:28:18,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:18,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-11-27 20:28:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:18,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:18,668 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2024-11-27 20:28:18,668 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-11-27 20:28:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 506 events. 341/506 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1405 event pairs, 228 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 437. Up to 503 conditions per place. [2024-11-27 20:28:18,676 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2024-11-27 20:28:18,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 138 flow [2024-11-27 20:28:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:28:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:28:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-11-27 20:28:18,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-27 20:28:18,680 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 72 flow. Second operand 3 states and 44 transitions. [2024-11-27 20:28:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 138 flow [2024-11-27 20:28:18,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:28:18,683 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 102 flow [2024-11-27 20:28:18,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-11-27 20:28:18,684 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-27 20:28:18,684 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 102 flow [2024-11-27 20:28:18,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-11-27 20:28:18,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:18,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:18,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:28:18,687 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:18,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash 451310840, now seen corresponding path program 1 times [2024-11-27 20:28:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:18,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205345589] [2024-11-27 20:28:18,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:28:18,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205345589] [2024-11-27 20:28:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205345589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172357403] [2024-11-27 20:28:19,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:19,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:19,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:19,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:19,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:28:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:19,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:28:19,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:28:19,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:28:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172357403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:28:19,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:28:19,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-27 20:28:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766683123] [2024-11-27 20:28:19,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:28:19,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:28:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:19,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:28:19,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:28:19,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:19,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:19,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:19,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:19,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:19,675 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2024-11-27 20:28:19,675 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-27 20:28:19,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 515 events. 341/515 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1403 event pairs, 228 based on Foata normal form. 6/436 useless extension candidates. Maximal degree in co-relation 1106. Up to 503 conditions per place. [2024-11-27 20:28:19,685 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2024-11-27 20:28:19,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 216 flow [2024-11-27 20:28:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:28:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:28:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-11-27 20:28:19,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-11-27 20:28:19,689 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 102 flow. Second operand 6 states and 71 transitions. [2024-11-27 20:28:19,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 216 flow [2024-11-27 20:28:19,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:28:19,694 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2024-11-27 20:28:19,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2024-11-27 20:28:19,695 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-27 20:28:19,695 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2024-11-27 20:28:19,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:19,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:19,696 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:19,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:19,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:19,897 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:19,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash -874469935, now seen corresponding path program 2 times [2024-11-27 20:28:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659845608] [2024-11-27 20:28:19,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:28:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:20,044 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:28:20,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:28:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659845608] [2024-11-27 20:28:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659845608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:20,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:20,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:28:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418855245] [2024-11-27 20:28:20,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:20,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:28:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:20,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:28:20,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:28:20,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:20,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:28:20,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:20,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:20,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:21,399 INFO L124 PetriNetUnfolderBase]: 681/1011 cut-off events. [2024-11-27 20:28:21,399 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-11-27 20:28:21,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2260 conditions, 1011 events. 681/1011 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3568 event pairs, 228 based on Foata normal form. 1/804 useless extension candidates. Maximal degree in co-relation 2171. Up to 539 conditions per place. [2024-11-27 20:28:21,408 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2024-11-27 20:28:21,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 403 flow [2024-11-27 20:28:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:28:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:28:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-11-27 20:28:21,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-11-27 20:28:21,413 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 69 transitions. [2024-11-27 20:28:21,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 403 flow [2024-11-27 20:28:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 379 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-27 20:28:21,420 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 201 flow [2024-11-27 20:28:21,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2024-11-27 20:28:21,422 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-11-27 20:28:21,423 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 201 flow [2024-11-27 20:28:21,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:28:21,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:21,424 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:21,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:28:21,425 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:21,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1355849791, now seen corresponding path program 3 times [2024-11-27 20:28:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:21,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823762822] [2024-11-27 20:28:21,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:28:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:21,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:28:21,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:28:22,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823762822] [2024-11-27 20:28:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823762822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:22,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:22,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:28:22,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856094556] [2024-11-27 20:28:22,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:22,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:28:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:22,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:28:22,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:28:22,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:22,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:28:22,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:22,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:22,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:22,853 INFO L124 PetriNetUnfolderBase]: 979/1443 cut-off events. [2024-11-27 20:28:22,854 INFO L125 PetriNetUnfolderBase]: For 693/693 co-relation queries the response was YES. [2024-11-27 20:28:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3776 conditions, 1443 events. 979/1443 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5460 event pairs, 380 based on Foata normal form. 1/1442 useless extension candidates. Maximal degree in co-relation 3696. Up to 862 conditions per place. [2024-11-27 20:28:22,866 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 61 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2024-11-27 20:28:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 425 flow [2024-11-27 20:28:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:28:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:28:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-27 20:28:22,869 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-27 20:28:22,869 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 201 flow. Second operand 4 states and 67 transitions. [2024-11-27 20:28:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 425 flow [2024-11-27 20:28:22,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 70 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:28:22,875 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 250 flow [2024-11-27 20:28:22,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2024-11-27 20:28:22,877 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2024-11-27 20:28:22,877 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 250 flow [2024-11-27 20:28:22,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:28:22,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:22,878 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:22,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:28:22,878 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:22,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1548268651, now seen corresponding path program 1 times [2024-11-27 20:28:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:22,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419256851] [2024-11-27 20:28:22,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:28:23,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419256851] [2024-11-27 20:28:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419256851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097993339] [2024-11-27 20:28:23,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:23,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:23,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:28:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:23,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:28:23,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:28:23,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:28:23,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097993339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:28:23,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:28:23,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-27 20:28:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918008771] [2024-11-27 20:28:23,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:28:23,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:28:23,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:23,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:28:23,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:28:23,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:23,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 250 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:23,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:23,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:23,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:24,470 INFO L124 PetriNetUnfolderBase]: 979/1446 cut-off events. [2024-11-27 20:28:24,471 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2024-11-27 20:28:24,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4290 conditions, 1446 events. 979/1446 cut-off events. For 1506/1506 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5407 event pairs, 672 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 4195. Up to 1429 conditions per place. [2024-11-27 20:28:24,488 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-27 20:28:24,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 368 flow [2024-11-27 20:28:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:28:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:28:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-27 20:28:24,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-11-27 20:28:24,490 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 250 flow. Second operand 7 states and 72 transitions. [2024-11-27 20:28:24,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 368 flow [2024-11-27 20:28:24,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-27 20:28:24,499 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 316 flow [2024-11-27 20:28:24,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=316, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-27 20:28:24,502 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-11-27 20:28:24,503 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 316 flow [2024-11-27 20:28:24,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:24,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:24,504 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:24,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:28:24,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 20:28:24,705 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:24,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash -460206650, now seen corresponding path program 2 times [2024-11-27 20:28:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792007297] [2024-11-27 20:28:24,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:28:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:24,830 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:28:24,830 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:25,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:25,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792007297] [2024-11-27 20:28:25,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792007297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:25,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48935099] [2024-11-27 20:28:25,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:28:25,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:25,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:25,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:28:25,512 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:28:25,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:25,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:28:25,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:25,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:25,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48935099] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:25,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:25,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-27 20:28:25,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059570227] [2024-11-27 20:28:25,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:25,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:25,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:25,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:25,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:28:25,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:25,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:25,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:26,419 INFO L124 PetriNetUnfolderBase]: 1039/1532 cut-off events. [2024-11-27 20:28:26,419 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-11-27 20:28:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4565 conditions, 1532 events. 1039/1532 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6061 event pairs, 108 based on Foata normal form. 26/1558 useless extension candidates. Maximal degree in co-relation 4449. Up to 645 conditions per place. [2024-11-27 20:28:26,432 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 77 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-27 20:28:26,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 617 flow [2024-11-27 20:28:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-27 20:28:26,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-11-27 20:28:26,435 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 316 flow. Second operand 5 states and 81 transitions. [2024-11-27 20:28:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 617 flow [2024-11-27 20:28:26,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 581 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-27 20:28:26,442 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 327 flow [2024-11-27 20:28:26,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-11-27 20:28:26,444 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-11-27 20:28:26,444 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 327 flow [2024-11-27 20:28:26,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:26,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:26,444 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:26,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:28:26,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:26,646 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:26,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash 140701694, now seen corresponding path program 1 times [2024-11-27 20:28:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:26,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957111363] [2024-11-27 20:28:26,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:26,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957111363] [2024-11-27 20:28:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957111363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338985301] [2024-11-27 20:28:27,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:27,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:27,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:27,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:28:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:27,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:28:27,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 20:28:27,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338985301] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 15 [2024-11-27 20:28:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488165272] [2024-11-27 20:28:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:27,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:28:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:27,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:28:27,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:28:27,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:27,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:27,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:27,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:27,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:28,836 INFO L124 PetriNetUnfolderBase]: 1595/2380 cut-off events. [2024-11-27 20:28:28,837 INFO L125 PetriNetUnfolderBase]: For 4312/4312 co-relation queries the response was YES. [2024-11-27 20:28:28,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7781 conditions, 2380 events. 1595/2380 cut-off events. For 4312/4312 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10802 event pairs, 318 based on Foata normal form. 1/2381 useless extension candidates. Maximal degree in co-relation 7679. Up to 1194 conditions per place. [2024-11-27 20:28:28,857 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 25 changer transitions 3/121 dead transitions. [2024-11-27 20:28:28,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 121 transitions, 932 flow [2024-11-27 20:28:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:28:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:28:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-11-27 20:28:28,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.553763440860215 [2024-11-27 20:28:28,864 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 327 flow. Second operand 6 states and 103 transitions. [2024-11-27 20:28:28,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 121 transitions, 932 flow [2024-11-27 20:28:28,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 121 transitions, 892 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-27 20:28:28,881 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 555 flow [2024-11-27 20:28:28,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=555, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2024-11-27 20:28:28,883 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-11-27 20:28:28,883 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 555 flow [2024-11-27 20:28:28,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:28:28,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:28,885 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:28,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:29,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:29,086 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:29,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -842307088, now seen corresponding path program 2 times [2024-11-27 20:28:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435157856] [2024-11-27 20:28:29,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:28:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:29,237 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:28:29,239 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435157856] [2024-11-27 20:28:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435157856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908485877] [2024-11-27 20:28:29,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:28:29,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:29,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:29,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:29,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:28:29,918 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:28:29,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:29,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:28:29,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:29,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:30,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908485877] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:30,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-27 20:28:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884946636] [2024-11-27 20:28:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:30,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:30,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:30,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:28:30,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:30,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 555 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:30,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:30,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:30,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:30,927 INFO L124 PetriNetUnfolderBase]: 1595/2374 cut-off events. [2024-11-27 20:28:30,927 INFO L125 PetriNetUnfolderBase]: For 6366/6366 co-relation queries the response was YES. [2024-11-27 20:28:30,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9368 conditions, 2374 events. 1595/2374 cut-off events. For 6366/6366 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10407 event pairs, 340 based on Foata normal form. 40/2414 useless extension candidates. Maximal degree in co-relation 9260. Up to 994 conditions per place. [2024-11-27 20:28:30,952 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 79 selfloop transitions, 20 changer transitions 4/104 dead transitions. [2024-11-27 20:28:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 908 flow [2024-11-27 20:28:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-27 20:28:30,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-11-27 20:28:30,954 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 555 flow. Second operand 5 states and 77 transitions. [2024-11-27 20:28:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 908 flow [2024-11-27 20:28:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 104 transitions, 870 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-27 20:28:30,983 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 593 flow [2024-11-27 20:28:30,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=593, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-11-27 20:28:30,984 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-11-27 20:28:30,984 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 593 flow [2024-11-27 20:28:30,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:30,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:30,985 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:31,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:28:31,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:31,191 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:31,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1607560454, now seen corresponding path program 3 times [2024-11-27 20:28:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208591823] [2024-11-27 20:28:31,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:28:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:31,290 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:28:31,290 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:31,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:31,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208591823] [2024-11-27 20:28:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208591823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:31,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:31,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130061356] [2024-11-27 20:28:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:31,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:31,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:31,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:31,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:31,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 593 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:31,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:31,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:32,320 INFO L124 PetriNetUnfolderBase]: 1206/1790 cut-off events. [2024-11-27 20:28:32,320 INFO L125 PetriNetUnfolderBase]: For 6565/6565 co-relation queries the response was YES. [2024-11-27 20:28:32,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 1790 events. 1206/1790 cut-off events. For 6565/6565 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7486 event pairs, 269 based on Foata normal form. 16/1806 useless extension candidates. Maximal degree in co-relation 7250. Up to 963 conditions per place. [2024-11-27 20:28:32,342 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 99 selfloop transitions, 10 changer transitions 16/126 dead transitions. [2024-11-27 20:28:32,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 1152 flow [2024-11-27 20:28:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-27 20:28:32,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-27 20:28:32,344 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 593 flow. Second operand 5 states and 80 transitions. [2024-11-27 20:28:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 1152 flow [2024-11-27 20:28:32,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 1102 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-27 20:28:32,368 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 600 flow [2024-11-27 20:28:32,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=600, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-11-27 20:28:32,370 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-11-27 20:28:32,370 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 600 flow [2024-11-27 20:28:32,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:32,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:32,370 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:32,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:28:32,371 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:32,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash 153144884, now seen corresponding path program 4 times [2024-11-27 20:28:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:32,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646283945] [2024-11-27 20:28:32,372 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:28:32,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:32,462 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:28:32,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:32,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646283945] [2024-11-27 20:28:32,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646283945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:32,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269259885] [2024-11-27 20:28:32,947 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:28:32,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:32,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:32,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:32,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:28:33,199 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:28:33,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:33,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:28:33,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:33,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269259885] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:33,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-27 20:28:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703350354] [2024-11-27 20:28:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:33,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:33,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:33,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:28:33,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:33,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 600 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:33,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:33,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:33,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:34,212 INFO L124 PetriNetUnfolderBase]: 1280/1896 cut-off events. [2024-11-27 20:28:34,214 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-11-27 20:28:34,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8153 conditions, 1896 events. 1280/1896 cut-off events. For 6808/6808 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7821 event pairs, 346 based on Foata normal form. 28/1920 useless extension candidates. Maximal degree in co-relation 8039. Up to 991 conditions per place. [2024-11-27 20:28:34,241 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 103 selfloop transitions, 14 changer transitions 1/119 dead transitions. [2024-11-27 20:28:34,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 1060 flow [2024-11-27 20:28:34,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-27 20:28:34,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-11-27 20:28:34,244 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 600 flow. Second operand 5 states and 84 transitions. [2024-11-27 20:28:34,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 1060 flow [2024-11-27 20:28:34,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 1003 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-27 20:28:34,275 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 612 flow [2024-11-27 20:28:34,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-11-27 20:28:34,276 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-11-27 20:28:34,277 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 612 flow [2024-11-27 20:28:34,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:34,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:34,277 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:34,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:34,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:28:34,481 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:34,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1248665698, now seen corresponding path program 3 times [2024-11-27 20:28:34,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:34,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847625595] [2024-11-27 20:28:34,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:28:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:34,574 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:28:34,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:34,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847625595] [2024-11-27 20:28:34,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847625595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572197359] [2024-11-27 20:28:34,933 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:28:34,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:34,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:28:35,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:28:35,181 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:35,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:28:35,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:35,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572197359] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-27 20:28:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258956146] [2024-11-27 20:28:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:35,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:35,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:35,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:28:35,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:35,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 612 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:35,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:35,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:35,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:36,261 INFO L124 PetriNetUnfolderBase]: 1460/2172 cut-off events. [2024-11-27 20:28:36,261 INFO L125 PetriNetUnfolderBase]: For 6977/6977 co-relation queries the response was YES. [2024-11-27 20:28:36,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9009 conditions, 2172 events. 1460/2172 cut-off events. For 6977/6977 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9393 event pairs, 164 based on Foata normal form. 30/2028 useless extension candidates. Maximal degree in co-relation 8896. Up to 1486 conditions per place. [2024-11-27 20:28:36,288 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 102 selfloop transitions, 20 changer transitions 1/124 dead transitions. [2024-11-27 20:28:36,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 124 transitions, 1122 flow [2024-11-27 20:28:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-27 20:28:36,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-27 20:28:36,289 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 612 flow. Second operand 5 states and 79 transitions. [2024-11-27 20:28:36,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 124 transitions, 1122 flow [2024-11-27 20:28:36,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 1092 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:28:36,320 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 702 flow [2024-11-27 20:28:36,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=702, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-11-27 20:28:36,321 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-11-27 20:28:36,321 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 702 flow [2024-11-27 20:28:36,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:36,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:36,322 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:36,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:36,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:28:36,523 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:36,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1228196948, now seen corresponding path program 5 times [2024-11-27 20:28:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063139091] [2024-11-27 20:28:36,525 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:28:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:36,590 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 20:28:36,591 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:36,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:36,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063139091] [2024-11-27 20:28:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063139091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:36,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:36,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:36,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779927667] [2024-11-27 20:28:36,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:36,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:36,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:36,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:36,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:36,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:36,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 702 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:36,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:36,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:36,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:37,848 INFO L124 PetriNetUnfolderBase]: 1400/2074 cut-off events. [2024-11-27 20:28:37,848 INFO L125 PetriNetUnfolderBase]: For 8243/8243 co-relation queries the response was YES. [2024-11-27 20:28:37,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9092 conditions, 2074 events. 1400/2074 cut-off events. For 8243/8243 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8810 event pairs, 401 based on Foata normal form. 16/1924 useless extension candidates. Maximal degree in co-relation 8976. Up to 1265 conditions per place. [2024-11-27 20:28:37,876 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 99 selfloop transitions, 12 changer transitions 12/124 dead transitions. [2024-11-27 20:28:37,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1149 flow [2024-11-27 20:28:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-27 20:28:37,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-27 20:28:37,878 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 702 flow. Second operand 5 states and 79 transitions. [2024-11-27 20:28:37,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1149 flow [2024-11-27 20:28:37,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1141 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:28:37,913 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 728 flow [2024-11-27 20:28:37,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-11-27 20:28:37,915 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-11-27 20:28:37,915 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 728 flow [2024-11-27 20:28:37,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:37,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:37,916 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:37,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:28:37,916 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:37,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 316596484, now seen corresponding path program 4 times [2024-11-27 20:28:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304955407] [2024-11-27 20:28:37,918 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:28:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:37,969 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:28:37,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304955407] [2024-11-27 20:28:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304955407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:38,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410780603] [2024-11-27 20:28:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:38,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:38,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:38,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:38,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:38,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:38,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:39,122 INFO L124 PetriNetUnfolderBase]: 1290/1894 cut-off events. [2024-11-27 20:28:39,122 INFO L125 PetriNetUnfolderBase]: For 7863/7863 co-relation queries the response was YES. [2024-11-27 20:28:39,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8737 conditions, 1894 events. 1290/1894 cut-off events. For 7863/7863 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7707 event pairs, 356 based on Foata normal form. 14/1758 useless extension candidates. Maximal degree in co-relation 8619. Up to 1093 conditions per place. [2024-11-27 20:28:39,147 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 101 selfloop transitions, 16 changer transitions 9/127 dead transitions. [2024-11-27 20:28:39,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1182 flow [2024-11-27 20:28:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:28:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:28:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-11-27 20:28:39,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-27 20:28:39,150 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 728 flow. Second operand 6 states and 88 transitions. [2024-11-27 20:28:39,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1182 flow [2024-11-27 20:28:39,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1137 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-27 20:28:39,190 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 724 flow [2024-11-27 20:28:39,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-11-27 20:28:39,192 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-11-27 20:28:39,192 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 724 flow [2024-11-27 20:28:39,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:39,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:39,193 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:39,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:28:39,193 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:39,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -607656188, now seen corresponding path program 6 times [2024-11-27 20:28:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:39,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681324643] [2024-11-27 20:28:39,194 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:28:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:39,288 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:28:39,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681324643] [2024-11-27 20:28:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681324643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:39,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:39,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694932233] [2024-11-27 20:28:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:39,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:39,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:39,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:39,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:39,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:39,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 724 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:39,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:39,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:39,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:40,406 INFO L124 PetriNetUnfolderBase]: 1238/1828 cut-off events. [2024-11-27 20:28:40,407 INFO L125 PetriNetUnfolderBase]: For 8509/8509 co-relation queries the response was YES. [2024-11-27 20:28:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8523 conditions, 1828 events. 1238/1828 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7374 event pairs, 338 based on Foata normal form. 32/1714 useless extension candidates. Maximal degree in co-relation 8406. Up to 940 conditions per place. [2024-11-27 20:28:40,424 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 100 selfloop transitions, 22 changer transitions 13/136 dead transitions. [2024-11-27 20:28:40,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1257 flow [2024-11-27 20:28:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:28:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:28:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-11-27 20:28:40,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2024-11-27 20:28:40,426 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 724 flow. Second operand 7 states and 104 transitions. [2024-11-27 20:28:40,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1257 flow [2024-11-27 20:28:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1214 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-27 20:28:40,461 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 749 flow [2024-11-27 20:28:40,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-11-27 20:28:40,462 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-11-27 20:28:40,462 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 749 flow [2024-11-27 20:28:40,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:40,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:40,463 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:40,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:28:40,463 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:40,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1790813582, now seen corresponding path program 5 times [2024-11-27 20:28:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115425584] [2024-11-27 20:28:40,464 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:28:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:40,532 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 20:28:40,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115425584] [2024-11-27 20:28:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115425584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:40,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476738031] [2024-11-27 20:28:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:40,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:40,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:40,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:40,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:40,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 749 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:40,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:40,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:40,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:41,564 INFO L124 PetriNetUnfolderBase]: 1159/1711 cut-off events. [2024-11-27 20:28:41,564 INFO L125 PetriNetUnfolderBase]: For 8825/8825 co-relation queries the response was YES. [2024-11-27 20:28:41,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8112 conditions, 1711 events. 1159/1711 cut-off events. For 8825/8825 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6869 event pairs, 329 based on Foata normal form. 14/1587 useless extension candidates. Maximal degree in co-relation 7993. Up to 1067 conditions per place. [2024-11-27 20:28:41,587 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 84 selfloop transitions, 19 changer transitions 9/113 dead transitions. [2024-11-27 20:28:41,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 1123 flow [2024-11-27 20:28:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-27 20:28:41,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2024-11-27 20:28:41,589 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 749 flow. Second operand 5 states and 74 transitions. [2024-11-27 20:28:41,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 1123 flow [2024-11-27 20:28:41,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 1059 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-27 20:28:41,627 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 763 flow [2024-11-27 20:28:41,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=763, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2024-11-27 20:28:41,628 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-11-27 20:28:41,629 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 763 flow [2024-11-27 20:28:41,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:41,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:41,629 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:41,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 20:28:41,630 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:41,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash 40562982, now seen corresponding path program 6 times [2024-11-27 20:28:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949192783] [2024-11-27 20:28:41,631 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:28:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:41,727 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:28:41,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:42,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949192783] [2024-11-27 20:28:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949192783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276615777] [2024-11-27 20:28:42,091 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:28:42,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:42,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:42,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:42,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:28:42,358 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:28:42,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:28:42,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:28:42,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:42,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276615777] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:28:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-27 20:28:42,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052219708] [2024-11-27 20:28:42,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:42,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:42,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:42,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:28:42,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:42,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 763 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:42,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:42,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:42,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:43,200 INFO L124 PetriNetUnfolderBase]: 1109/1647 cut-off events. [2024-11-27 20:28:43,200 INFO L125 PetriNetUnfolderBase]: For 8594/8594 co-relation queries the response was YES. [2024-11-27 20:28:43,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 1647 events. 1109/1647 cut-off events. For 8594/8594 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6524 event pairs, 319 based on Foata normal form. 30/1543 useless extension candidates. Maximal degree in co-relation 7812. Up to 1067 conditions per place. [2024-11-27 20:28:43,219 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 90 selfloop transitions, 22 changer transitions 1/114 dead transitions. [2024-11-27 20:28:43,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 1152 flow [2024-11-27 20:28:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-27 20:28:43,221 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-11-27 20:28:43,221 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 763 flow. Second operand 5 states and 77 transitions. [2024-11-27 20:28:43,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 1152 flow [2024-11-27 20:28:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 1112 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-27 20:28:43,257 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 810 flow [2024-11-27 20:28:43,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=810, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-27 20:28:43,258 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-11-27 20:28:43,259 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 810 flow [2024-11-27 20:28:43,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:43,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:43,259 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:43,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 20:28:43,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:28:43,460 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:43,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1427586048, now seen corresponding path program 7 times [2024-11-27 20:28:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:43,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330229536] [2024-11-27 20:28:43,461 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:28:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330229536] [2024-11-27 20:28:43,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330229536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:43,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:43,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799097010] [2024-11-27 20:28:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:43,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:43,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:43,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:43,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:43,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 810 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:43,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:43,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:43,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:44,467 INFO L124 PetriNetUnfolderBase]: 1053/1553 cut-off events. [2024-11-27 20:28:44,467 INFO L125 PetriNetUnfolderBase]: For 8149/8149 co-relation queries the response was YES. [2024-11-27 20:28:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7331 conditions, 1553 events. 1053/1553 cut-off events. For 8149/8149 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5999 event pairs, 283 based on Foata normal form. 28/1455 useless extension candidates. Maximal degree in co-relation 7211. Up to 893 conditions per place. [2024-11-27 20:28:44,484 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 87 selfloop transitions, 23 changer transitions 1/112 dead transitions. [2024-11-27 20:28:44,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1147 flow [2024-11-27 20:28:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-27 20:28:44,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-27 20:28:44,485 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 810 flow. Second operand 5 states and 76 transitions. [2024-11-27 20:28:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1147 flow [2024-11-27 20:28:44,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 1076 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-27 20:28:44,519 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 778 flow [2024-11-27 20:28:44,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=778, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-11-27 20:28:44,520 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-11-27 20:28:44,521 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 778 flow [2024-11-27 20:28:44,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:44,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:44,521 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:44,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-27 20:28:44,521 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:44,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1630413034, now seen corresponding path program 7 times [2024-11-27 20:28:44,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:44,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733401750] [2024-11-27 20:28:44,522 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:28:44,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-27 20:28:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733401750] [2024-11-27 20:28:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733401750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:28:44,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:28:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:28:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630558692] [2024-11-27 20:28:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:28:44,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:28:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:28:44,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:28:44,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:28:44,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:28:44,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 778 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:44,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:28:44,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:28:44,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:28:45,565 INFO L124 PetriNetUnfolderBase]: 999/1463 cut-off events. [2024-11-27 20:28:45,565 INFO L125 PetriNetUnfolderBase]: For 7006/7006 co-relation queries the response was YES. [2024-11-27 20:28:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6787 conditions, 1463 events. 999/1463 cut-off events. For 7006/7006 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5540 event pairs, 279 based on Foata normal form. 14/1359 useless extension candidates. Maximal degree in co-relation 6668. Up to 975 conditions per place. [2024-11-27 20:28:45,580 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 79 selfloop transitions, 21 changer transitions 10/111 dead transitions. [2024-11-27 20:28:45,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 1120 flow [2024-11-27 20:28:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:28:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:28:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-11-27 20:28:45,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-11-27 20:28:45,582 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 778 flow. Second operand 5 states and 73 transitions. [2024-11-27 20:28:45,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 1120 flow [2024-11-27 20:28:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 1074 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:28:45,609 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 762 flow [2024-11-27 20:28:45,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=762, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2024-11-27 20:28:45,610 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-11-27 20:28:45,610 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 762 flow [2024-11-27 20:28:45,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:28:45,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:28:45,610 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:28:45,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 20:28:45,611 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:28:45,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:28:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1936359968, now seen corresponding path program 1 times [2024-11-27 20:28:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:28:45,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977977759] [2024-11-27 20:28:45,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:28:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-27 20:28:45,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:28:45,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977977759] [2024-11-27 20:28:45,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977977759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:28:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81483618] [2024-11-27 20:28:45,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:28:45,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:28:45,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:28:45,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:28:46,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:28:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:28:46,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 20:28:46,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:28:46,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:28:46,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-27 20:28:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 20:28:46,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:28:58,934 INFO L349 Elim1Store]: treesize reduction 28, result has 94.9 percent of original size [2024-11-27 20:28:58,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 210 treesize of output 583 [2024-11-27 20:36:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 20:36:35,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81483618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:36:35,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:36:35,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 21 [2024-11-27 20:36:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271643878] [2024-11-27 20:36:35,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:36:35,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 20:36:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:36:35,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 20:36:35,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=350, Unknown=2, NotChecked=0, Total=420 [2024-11-27 20:36:35,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:36:35,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 762 flow. Second operand has 21 states, 21 states have (on average 6.761904761904762) internal successors, (142), 21 states have internal predecessors, (142), 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) [2024-11-27 20:36:35,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:36:35,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:36:35,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:36:39,485 INFO L124 PetriNetUnfolderBase]: 2074/3014 cut-off events. [2024-11-27 20:36:39,486 INFO L125 PetriNetUnfolderBase]: For 13721/13721 co-relation queries the response was YES. [2024-11-27 20:36:39,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 3014 events. 2074/3014 cut-off events. For 13721/13721 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13668 event pairs, 205 based on Foata normal form. 6/2732 useless extension candidates. Maximal degree in co-relation 13540. Up to 1263 conditions per place. [2024-11-27 20:36:39,514 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 42 changer transitions 99/301 dead transitions. [2024-11-27 20:36:39,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 301 transitions, 3375 flow [2024-11-27 20:36:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:36:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-27 20:36:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2024-11-27 20:36:39,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-11-27 20:36:39,516 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 762 flow. Second operand 16 states and 208 transitions. [2024-11-27 20:36:39,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 301 transitions, 3375 flow [2024-11-27 20:36:39,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 301 transitions, 3065 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-27 20:36:39,574 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 1246 flow [2024-11-27 20:36:39,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1246, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2024-11-27 20:36:39,575 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-11-27 20:36:39,575 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 1246 flow [2024-11-27 20:36:39,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.761904761904762) internal successors, (142), 21 states have internal predecessors, (142), 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) [2024-11-27 20:36:39,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:36:39,576 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:36:39,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:36:39,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:39,780 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:36:39,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:36:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 762418507, now seen corresponding path program 2 times [2024-11-27 20:36:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:36:39,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104507180] [2024-11-27 20:36:39,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:36:39,862 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:39,863 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-27 20:36:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:36:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104507180] [2024-11-27 20:36:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104507180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:36:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944175854] [2024-11-27 20:36:40,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:40,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:36:40,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:36:40,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:36:40,474 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:40,474 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:40,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 20:36:40,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:36:41,575 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-27 20:36:41,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-11-27 20:36:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 20:36:41,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:36:47,445 INFO L349 Elim1Store]: treesize reduction 341, result has 75.9 percent of original size [2024-11-27 20:36:47,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 311 treesize of output 1144 [2024-11-27 20:37:02,787 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 20:37:02,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-27 20:37:02,788 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 20:37:02,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:37:02,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 20:37:02,989 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-27 20:37:02,995 INFO L158 Benchmark]: Toolchain (without parser) took 529122.78ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 92.7MB in the beginning and 670.6MB in the end (delta: -577.9MB). Peak memory consumption was 444.0MB. Max. memory is 16.1GB. [2024-11-27 20:37:02,996 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:37:02,996 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.36ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.7MB in the end (delta: 12.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:37:02,996 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.03ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 77.3MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:37:02,997 INFO L158 Benchmark]: Boogie Preprocessor took 90.06ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 74.6MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:37:02,997 INFO L158 Benchmark]: RCFGBuilder took 1564.81ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 40.3MB in the end (delta: 34.3MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2024-11-27 20:37:02,997 INFO L158 Benchmark]: TraceAbstraction took 526967.80ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 39.8MB in the beginning and 670.6MB in the end (delta: -630.8MB). Peak memory consumption was 388.6MB. Max. memory is 16.1GB. [2024-11-27 20:37:03,000 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 425.36ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.7MB in the end (delta: 12.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.03ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 77.3MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 90.06ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 74.6MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1564.81ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 40.3MB in the end (delta: 34.3MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * TraceAbstraction took 526967.80ms. Allocated memory was 117.4MB in the beginning and 721.4MB in the end (delta: 604.0MB). Free memory was 39.8MB in the beginning and 670.6MB in the end (delta: -630.8MB). Peak memory consumption was 388.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB --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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:37:05,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:37:06,031 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 20:37:06,043 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:37:06,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:37:06,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:37:06,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:37:06,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:37:06,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:37:06,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:37:06,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:37:06,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:37:06,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:37:06,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:37:06,099 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:37:06,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:37:06,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:37:06,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:37:06,101 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:37:06,102 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:37:06,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:37:06,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:37:06,102 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:37:06,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:37:06,102 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:37:06,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:37:06,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:37:06,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:37:06,104 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-27 20:37:06,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:37:06,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:37:06,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:37:06,527 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:37:06,528 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:37:06,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-27 20:37:10,100 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/579dd3324/56e4ca9bcaaf489f8c6fb4d14ebfe6f3/FLAG320a6fd76 [2024-11-27 20:37:10,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:37:10,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-27 20:37:10,404 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/579dd3324/56e4ca9bcaaf489f8c6fb4d14ebfe6f3/FLAG320a6fd76 [2024-11-27 20:37:10,420 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/data/579dd3324/56e4ca9bcaaf489f8c6fb4d14ebfe6f3 [2024-11-27 20:37:10,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:37:10,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:37:10,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:37:10,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:37:10,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:37:10,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224635b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10, skipping insertion in model container [2024-11-27 20:37:10,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:37:10,682 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-11-27 20:37:10,691 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:37:10,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:37:10,713 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:37:10,774 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-11-27 20:37:10,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:37:10,812 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:37:10,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10 WrapperNode [2024-11-27 20:37:10,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:37:10,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:37:10,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:37:10,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:37:10,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,874 INFO L138 Inliner]: procedures = 27, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 259 [2024-11-27 20:37:10,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:37:10,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:37:10,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:37:10,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:37:10,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,943 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-27 20:37:10,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,969 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,989 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:10,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:11,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:37:11,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:37:11,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:37:11,007 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:37:11,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (1/1) ... [2024-11-27 20:37:11,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:37:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:11,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:37:11,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:37:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:37:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:37:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 20:37:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 20:37:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 20:37:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:37:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:37:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:37:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:37:11,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 20:37:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 20:37:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:37:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:37:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:37:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 20:37:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 20:37:11,103 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:37:11,325 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:37:11,328 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:37:12,231 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:37:12,233 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:37:12,998 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:37:12,998 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 20:37:12,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:37:12 BoogieIcfgContainer [2024-11-27 20:37:12,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:37:13,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:37:13,001 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:37:13,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:37:13,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:37:10" (1/3) ... [2024-11-27 20:37:13,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b5d83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:37:13, skipping insertion in model container [2024-11-27 20:37:13,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:37:10" (2/3) ... [2024-11-27 20:37:13,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b5d83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:37:13, skipping insertion in model container [2024-11-27 20:37:13,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:37:12" (3/3) ... [2024-11-27 20:37:13,015 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-27 20:37:13,037 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:37:13,039 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 20:37:13,041 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:37:13,159 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:37:13,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 20:37:13,273 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-27 20:37:13,277 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:37:13,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-27 20:37:13,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 20:37:13,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-27 20:37:13,299 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:37:13,316 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;@1066b619, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:37:13,317 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 20:37:13,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:37:13,344 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-27 20:37:13,344 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:37:13,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:13,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:13,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:13,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1735075232, now seen corresponding path program 1 times [2024-11-27 20:37:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802780527] [2024-11-27 20:37:13,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:13,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:13,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:13,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:37:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:13,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:37:13,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:37:13,707 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:13,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802780527] [2024-11-27 20:37:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802780527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:37:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066472582] [2024-11-27 20:37:13,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:13,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:37:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:13,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:37:13,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:37:13,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:13,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:13,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:13,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:13,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:14,303 INFO L124 PetriNetUnfolderBase]: 232/341 cut-off events. [2024-11-27 20:37:14,303 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-27 20:37:14,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 341 events. 232/341 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 848 event pairs, 46 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 618. Up to 178 conditions per place. [2024-11-27 20:37:14,314 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 37 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2024-11-27 20:37:14,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 194 flow [2024-11-27 20:37:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:37:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:37:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-27 20:37:14,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2024-11-27 20:37:14,338 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 4 states and 59 transitions. [2024-11-27 20:37:14,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 194 flow [2024-11-27 20:37:14,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:37:14,352 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 87 flow [2024-11-27 20:37:14,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-27 20:37:14,360 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-27 20:37:14,360 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 87 flow [2024-11-27 20:37:14,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:14,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:14,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:14,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:37:14,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:14,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:14,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2057039282, now seen corresponding path program 2 times [2024-11-27 20:37:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225832235] [2024-11-27 20:37:14,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:37:14,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:14,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:14,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:37:14,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:37:14,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:14,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:37:14,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:37:14,938 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:14,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225832235] [2024-11-27 20:37:14,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225832235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:14,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:37:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036382451] [2024-11-27 20:37:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:14,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:37:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:14,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:37:14,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:37:14,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:14,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:14,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:14,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:14,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:15,434 INFO L124 PetriNetUnfolderBase]: 361/537 cut-off events. [2024-11-27 20:37:15,434 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-11-27 20:37:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 537 events. 361/537 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1623 event pairs, 112 based on Foata normal form. 10/399 useless extension candidates. Maximal degree in co-relation 491. Up to 311 conditions per place. [2024-11-27 20:37:15,440 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 46 selfloop transitions, 5 changer transitions 4/56 dead transitions. [2024-11-27 20:37:15,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 265 flow [2024-11-27 20:37:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:37:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:37:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-27 20:37:15,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-27 20:37:15,443 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 87 flow. Second operand 4 states and 70 transitions. [2024-11-27 20:37:15,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 265 flow [2024-11-27 20:37:15,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 56 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:37:15,447 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 112 flow [2024-11-27 20:37:15,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-11-27 20:37:15,451 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-11-27 20:37:15,451 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 112 flow [2024-11-27 20:37:15,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:15,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:15,452 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:15,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:37:15,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:15,653 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:15,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1240139496, now seen corresponding path program 3 times [2024-11-27 20:37:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720849458] [2024-11-27 20:37:15,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:15,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:15,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:15,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:37:15,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:37:15,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:15,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:37:15,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:37:15,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:15,912 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720849458] [2024-11-27 20:37:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720849458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:15,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:15,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:37:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567420971] [2024-11-27 20:37:15,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:15,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:37:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:15,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:37:15,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:37:15,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:15,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:15,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:15,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:15,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:16,354 INFO L124 PetriNetUnfolderBase]: 317/470 cut-off events. [2024-11-27 20:37:16,354 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-11-27 20:37:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 470 events. 317/470 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1370 event pairs, 112 based on Foata normal form. 12/376 useless extension candidates. Maximal degree in co-relation 543. Up to 311 conditions per place. [2024-11-27 20:37:16,364 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 41 selfloop transitions, 6 changer transitions 3/51 dead transitions. [2024-11-27 20:37:16,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 265 flow [2024-11-27 20:37:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:37:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:37:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-27 20:37:16,368 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2024-11-27 20:37:16,368 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 112 flow. Second operand 4 states and 65 transitions. [2024-11-27 20:37:16,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 265 flow [2024-11-27 20:37:16,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 252 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-27 20:37:16,378 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 123 flow [2024-11-27 20:37:16,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-27 20:37:16,379 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-27 20:37:16,381 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 123 flow [2024-11-27 20:37:16,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-11-27 20:37:16,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:16,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:16,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:37:16,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:16,593 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:16,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -224168183, now seen corresponding path program 1 times [2024-11-27 20:37:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:16,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059521803] [2024-11-27 20:37:16,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:16,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:16,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:16,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:37:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:16,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:16,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:37:16,791 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:16,791 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059521803] [2024-11-27 20:37:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059521803] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:16,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:16,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:37:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250928198] [2024-11-27 20:37:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:16,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:37:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:16,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:37:16,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:37:16,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:16,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-11-27 20:37:16,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:16,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:16,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:17,040 INFO L124 PetriNetUnfolderBase]: 291/429 cut-off events. [2024-11-27 20:37:17,040 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-11-27 20:37:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 429 events. 291/429 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1115 event pairs, 165 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 509. Up to 426 conditions per place. [2024-11-27 20:37:17,046 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-11-27 20:37:17,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 197 flow [2024-11-27 20:37:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:37:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:37:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-11-27 20:37:17,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-27 20:37:17,050 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 123 flow. Second operand 3 states and 44 transitions. [2024-11-27 20:37:17,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 197 flow [2024-11-27 20:37:17,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 181 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:17,057 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2024-11-27 20:37:17,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-27 20:37:17,059 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-11-27 20:37:17,060 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2024-11-27 20:37:17,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2024-11-27 20:37:17,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:17,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:17,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:37:17,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:17,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:17,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -803158762, now seen corresponding path program 1 times [2024-11-27 20:37:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:17,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418808311] [2024-11-27 20:37:17,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:17,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:17,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:17,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:37:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:17,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:37:17,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:37:17,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:37:17,543 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418808311] [2024-11-27 20:37:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418808311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:37:17,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:17,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-11-27 20:37:17,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914773629] [2024-11-27 20:37:17,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:17,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:37:17,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:17,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:37:17,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:37:17,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:17,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:37:17,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:17,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:17,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:17,940 INFO L124 PetriNetUnfolderBase]: 291/438 cut-off events. [2024-11-27 20:37:17,940 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-11-27 20:37:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 438 events. 291/438 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1115 event pairs, 165 based on Foata normal form. 9/348 useless extension candidates. Maximal degree in co-relation 1112. Up to 426 conditions per place. [2024-11-27 20:37:17,944 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 15 changer transitions 0/44 dead transitions. [2024-11-27 20:37:17,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 261 flow [2024-11-27 20:37:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:37:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:37:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-11-27 20:37:17,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-11-27 20:37:17,946 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 6 states and 71 transitions. [2024-11-27 20:37:17,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 261 flow [2024-11-27 20:37:17,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:37:17,950 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 229 flow [2024-11-27 20:37:17,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-27 20:37:17,951 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-11-27 20:37:17,951 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 229 flow [2024-11-27 20:37:17,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:37:17,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:17,952 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:17,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:37:18,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:18,153 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:18,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1310031829, now seen corresponding path program 2 times [2024-11-27 20:37:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903003665] [2024-11-27 20:37:18,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:37:18,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:18,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:18,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:37:18,308 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:37:18,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:18,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:37:18,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:18,477 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:18,477 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903003665] [2024-11-27 20:37:18,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903003665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:18,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:18,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:37:18,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046928217] [2024-11-27 20:37:18,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:18,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:37:18,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:18,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:37:18,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:37:18,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:18,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:37:18,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:18,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:18,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:19,024 INFO L124 PetriNetUnfolderBase]: 588/866 cut-off events. [2024-11-27 20:37:19,025 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-11-27 20:37:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 866 events. 588/866 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2903 event pairs, 169 based on Foata normal form. 1/635 useless extension candidates. Maximal degree in co-relation 2184. Up to 460 conditions per place. [2024-11-27 20:37:19,033 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 69 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2024-11-27 20:37:19,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 503 flow [2024-11-27 20:37:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:37:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:37:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-11-27 20:37:19,036 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-11-27 20:37:19,036 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 229 flow. Second operand 4 states and 69 transitions. [2024-11-27 20:37:19,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 503 flow [2024-11-27 20:37:19,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 77 transitions, 479 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-27 20:37:19,042 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 255 flow [2024-11-27 20:37:19,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2024-11-27 20:37:19,043 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-11-27 20:37:19,043 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 255 flow [2024-11-27 20:37:19,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:37:19,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:19,044 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:19,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:37:19,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:19,244 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:19,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1446892895, now seen corresponding path program 3 times [2024-11-27 20:37:19,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:19,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271686467] [2024-11-27 20:37:19,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:19,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:19,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:37:19,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:37:19,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:19,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:37:19,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:19,529 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:19,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271686467] [2024-11-27 20:37:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271686467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:37:19,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204312615] [2024-11-27 20:37:19,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:19,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:37:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:19,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:37:19,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:37:19,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:19,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:37:19,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:19,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:20,218 INFO L124 PetriNetUnfolderBase]: 862/1258 cut-off events. [2024-11-27 20:37:20,219 INFO L125 PetriNetUnfolderBase]: For 1354/1354 co-relation queries the response was YES. [2024-11-27 20:37:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1258 events. 862/1258 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4515 event pairs, 274 based on Foata normal form. 1/1187 useless extension candidates. Maximal degree in co-relation 3644. Up to 741 conditions per place. [2024-11-27 20:37:20,235 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 66 selfloop transitions, 9 changer transitions 1/77 dead transitions. [2024-11-27 20:37:20,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 515 flow [2024-11-27 20:37:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:37:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:37:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-27 20:37:20,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-27 20:37:20,240 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 255 flow. Second operand 4 states and 67 transitions. [2024-11-27 20:37:20,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 515 flow [2024-11-27 20:37:20,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 515 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:37:20,249 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 310 flow [2024-11-27 20:37:20,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-11-27 20:37:20,250 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-11-27 20:37:20,253 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 310 flow [2024-11-27 20:37:20,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-11-27 20:37:20,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:20,253 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:20,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:37:20,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:20,454 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:20,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 919423431, now seen corresponding path program 1 times [2024-11-27 20:37:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:20,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806618346] [2024-11-27 20:37:20,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:20,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:37:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:20,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:20,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:20,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:20,823 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806618346] [2024-11-27 20:37:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806618346] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:20,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:20,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-27 20:37:20,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687854188] [2024-11-27 20:37:20,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:20,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:20,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:20,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:37:20,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:20,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:20,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:20,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:20,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:21,457 INFO L124 PetriNetUnfolderBase]: 917/1336 cut-off events. [2024-11-27 20:37:21,458 INFO L125 PetriNetUnfolderBase]: For 2146/2146 co-relation queries the response was YES. [2024-11-27 20:37:21,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4432 conditions, 1336 events. 917/1336 cut-off events. For 2146/2146 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5164 event pairs, 81 based on Foata normal form. 23/1283 useless extension candidates. Maximal degree in co-relation 4345. Up to 562 conditions per place. [2024-11-27 20:37:21,470 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-11-27 20:37:21,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 705 flow [2024-11-27 20:37:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-27 20:37:21,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-11-27 20:37:21,472 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 310 flow. Second operand 5 states and 81 transitions. [2024-11-27 20:37:21,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 705 flow [2024-11-27 20:37:21,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 703 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-27 20:37:21,483 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 377 flow [2024-11-27 20:37:21,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-11-27 20:37:21,484 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-11-27 20:37:21,484 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 377 flow [2024-11-27 20:37:21,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:21,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:21,485 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:21,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:37:21,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:21,686 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:21,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1031665321, now seen corresponding path program 1 times [2024-11-27 20:37:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761510966] [2024-11-27 20:37:21,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:21,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:21,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:21,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:21,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:37:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:21,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:21,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:21,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:22,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761510966] [2024-11-27 20:37:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761510966] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:22,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:22,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-27 20:37:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897460835] [2024-11-27 20:37:22,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:22,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:22,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:22,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:22,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:37:22,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:22,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:22,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:22,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:22,682 INFO L124 PetriNetUnfolderBase]: 971/1412 cut-off events. [2024-11-27 20:37:22,683 INFO L125 PetriNetUnfolderBase]: For 3445/3445 co-relation queries the response was YES. [2024-11-27 20:37:22,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5128 conditions, 1412 events. 971/1412 cut-off events. For 3445/3445 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5177 event pairs, 183 based on Foata normal form. 22/1354 useless extension candidates. Maximal degree in co-relation 5037. Up to 570 conditions per place. [2024-11-27 20:37:22,696 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 73 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-11-27 20:37:22,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 696 flow [2024-11-27 20:37:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-27 20:37:22,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-11-27 20:37:22,697 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 377 flow. Second operand 5 states and 77 transitions. [2024-11-27 20:37:22,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 696 flow [2024-11-27 20:37:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 675 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-27 20:37:22,712 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 420 flow [2024-11-27 20:37:22,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-11-27 20:37:22,713 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-11-27 20:37:22,714 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 420 flow [2024-11-27 20:37:22,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:22,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:22,714 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:22,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:37:22,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:22,915 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:22,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash -23608773, now seen corresponding path program 2 times [2024-11-27 20:37:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:22,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656549022] [2024-11-27 20:37:22,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:37:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:22,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:37:23,156 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:37:23,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:23,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:23,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:23,280 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:23,280 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656549022] [2024-11-27 20:37:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656549022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:23,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:23,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739926888] [2024-11-27 20:37:23,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:23,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:23,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:23,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:23,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:23,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:23,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:23,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:23,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:23,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:23,944 INFO L124 PetriNetUnfolderBase]: 993/1459 cut-off events. [2024-11-27 20:37:23,944 INFO L125 PetriNetUnfolderBase]: For 4162/4162 co-relation queries the response was YES. [2024-11-27 20:37:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5593 conditions, 1459 events. 993/1459 cut-off events. For 4162/4162 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5737 event pairs, 239 based on Foata normal form. 12/1387 useless extension candidates. Maximal degree in co-relation 5499. Up to 794 conditions per place. [2024-11-27 20:37:23,957 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 8 changer transitions 16/102 dead transitions. [2024-11-27 20:37:23,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 846 flow [2024-11-27 20:37:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-27 20:37:23,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-27 20:37:23,959 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 420 flow. Second operand 5 states and 80 transitions. [2024-11-27 20:37:23,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 846 flow [2024-11-27 20:37:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 816 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-27 20:37:23,974 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 433 flow [2024-11-27 20:37:23,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-27 20:37:23,975 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-11-27 20:37:23,975 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 433 flow [2024-11-27 20:37:23,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:23,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:23,976 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:23,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:37:24,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:24,180 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:24,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash 459496593, now seen corresponding path program 3 times [2024-11-27 20:37:24,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437723492] [2024-11-27 20:37:24,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:24,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:24,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:24,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:37:24,381 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:37:24,382 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:24,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:24,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:24,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:24,659 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437723492] [2024-11-27 20:37:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437723492] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:24,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:24,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-27 20:37:24,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103329846] [2024-11-27 20:37:24,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:24,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:24,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:24,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:24,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:37:24,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:24,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:24,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:24,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:24,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:25,450 INFO L124 PetriNetUnfolderBase]: 1049/1539 cut-off events. [2024-11-27 20:37:25,450 INFO L125 PetriNetUnfolderBase]: For 4921/4921 co-relation queries the response was YES. [2024-11-27 20:37:25,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6375 conditions, 1539 events. 1049/1539 cut-off events. For 4921/4921 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5950 event pairs, 287 based on Foata normal form. 22/1473 useless extension candidates. Maximal degree in co-relation 6278. Up to 816 conditions per place. [2024-11-27 20:37:25,466 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 86 selfloop transitions, 11 changer transitions 1/99 dead transitions. [2024-11-27 20:37:25,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 815 flow [2024-11-27 20:37:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-27 20:37:25,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-11-27 20:37:25,468 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 433 flow. Second operand 5 states and 84 transitions. [2024-11-27 20:37:25,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 815 flow [2024-11-27 20:37:25,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 795 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-27 20:37:25,485 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 453 flow [2024-11-27 20:37:25,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-11-27 20:37:25,486 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-11-27 20:37:25,486 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 453 flow [2024-11-27 20:37:25,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:25,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:25,486 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:25,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:37:25,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:25,690 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:25,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1995247391, now seen corresponding path program 2 times [2024-11-27 20:37:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698245476] [2024-11-27 20:37:25,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:37:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:25,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:25,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:37:25,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:37:25,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:25,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:25,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:26,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:26,098 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:26,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698245476] [2024-11-27 20:37:26,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698245476] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:26,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:26,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-27 20:37:26,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530251589] [2024-11-27 20:37:26,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:26,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:26,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:26,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:26,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:37:26,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:26,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:26,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:26,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:26,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:26,815 INFO L124 PetriNetUnfolderBase]: 1191/1753 cut-off events. [2024-11-27 20:37:26,815 INFO L125 PetriNetUnfolderBase]: For 5268/5268 co-relation queries the response was YES. [2024-11-27 20:37:26,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7171 conditions, 1753 events. 1191/1753 cut-off events. For 5268/5268 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7130 event pairs, 120 based on Foata normal form. 23/1676 useless extension candidates. Maximal degree in co-relation 7074. Up to 1200 conditions per place. [2024-11-27 20:37:26,831 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 84 selfloop transitions, 15 changer transitions 1/101 dead transitions. [2024-11-27 20:37:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 852 flow [2024-11-27 20:37:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-27 20:37:26,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-27 20:37:26,834 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 453 flow. Second operand 5 states and 79 transitions. [2024-11-27 20:37:26,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 852 flow [2024-11-27 20:37:26,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 828 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:26,852 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 501 flow [2024-11-27 20:37:26,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=501, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-27 20:37:26,852 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-11-27 20:37:26,853 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 501 flow [2024-11-27 20:37:26,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:26,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:26,853 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:26,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:37:27,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:27,054 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:27,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -513894541, now seen corresponding path program 3 times [2024-11-27 20:37:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413831137] [2024-11-27 20:37:27,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:27,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:27,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:37:27,235 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:37:27,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:27,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:27,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:27,356 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:27,356 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413831137] [2024-11-27 20:37:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413831137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:27,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:27,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163489146] [2024-11-27 20:37:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:27,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:27,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:27,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:27,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:27,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:27,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 501 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:27,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:27,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:27,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:28,140 INFO L124 PetriNetUnfolderBase]: 1148/1684 cut-off events. [2024-11-27 20:37:28,140 INFO L125 PetriNetUnfolderBase]: For 6097/6097 co-relation queries the response was YES. [2024-11-27 20:37:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7312 conditions, 1684 events. 1148/1684 cut-off events. For 6097/6097 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6754 event pairs, 323 based on Foata normal form. 11/1599 useless extension candidates. Maximal degree in co-relation 7212. Up to 961 conditions per place. [2024-11-27 20:37:28,165 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 76 selfloop transitions, 11 changer transitions 11/99 dead transitions. [2024-11-27 20:37:28,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 866 flow [2024-11-27 20:37:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-27 20:37:28,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-27 20:37:28,167 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 501 flow. Second operand 5 states and 80 transitions. [2024-11-27 20:37:28,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 866 flow [2024-11-27 20:37:28,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 857 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 20:37:28,187 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 520 flow [2024-11-27 20:37:28,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-11-27 20:37:28,187 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-11-27 20:37:28,190 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 520 flow [2024-11-27 20:37:28,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:28,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:28,191 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:28,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:37:28,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:28,392 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:28,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2122429039, now seen corresponding path program 4 times [2024-11-27 20:37:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:28,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092182249] [2024-11-27 20:37:28,394 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:37:28,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:28,396 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:28,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:37:30,394 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:37:30,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:30,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:30,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:30,516 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:30,516 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:30,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092182249] [2024-11-27 20:37:30,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092182249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:30,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:30,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591015819] [2024-11-27 20:37:30,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:30,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:30,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:30,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:30,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:30,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:30,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:31,234 INFO L124 PetriNetUnfolderBase]: 1058/1543 cut-off events. [2024-11-27 20:37:31,235 INFO L125 PetriNetUnfolderBase]: For 6188/6188 co-relation queries the response was YES. [2024-11-27 20:37:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 1543 events. 1058/1543 cut-off events. For 6188/6188 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5978 event pairs, 320 based on Foata normal form. 12/1467 useless extension candidates. Maximal degree in co-relation 6951. Up to 961 conditions per place. [2024-11-27 20:37:31,250 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 74 selfloop transitions, 11 changer transitions 9/95 dead transitions. [2024-11-27 20:37:31,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 857 flow [2024-11-27 20:37:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-27 20:37:31,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-27 20:37:31,252 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 520 flow. Second operand 5 states and 76 transitions. [2024-11-27 20:37:31,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 857 flow [2024-11-27 20:37:31,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 827 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:31,273 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 520 flow [2024-11-27 20:37:31,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-11-27 20:37:31,275 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-11-27 20:37:31,276 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 520 flow [2024-11-27 20:37:31,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:31,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:31,277 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:31,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:37:31,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:31,477 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:31,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1551997497, now seen corresponding path program 5 times [2024-11-27 20:37:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:31,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607715811] [2024-11-27 20:37:31,478 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:37:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:31,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:31,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:37:39,174 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:37:39,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:39,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:39,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:39,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:39,291 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607715811] [2024-11-27 20:37:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607715811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:39,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:39,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969901697] [2024-11-27 20:37:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:39,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:39,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:39,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:39,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:39,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:39,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:39,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:39,961 INFO L124 PetriNetUnfolderBase]: 1030/1503 cut-off events. [2024-11-27 20:37:39,961 INFO L125 PetriNetUnfolderBase]: For 6819/6819 co-relation queries the response was YES. [2024-11-27 20:37:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6924 conditions, 1503 events. 1030/1503 cut-off events. For 6819/6819 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5683 event pairs, 315 based on Foata normal form. 12/1429 useless extension candidates. Maximal degree in co-relation 6822. Up to 938 conditions per place. [2024-11-27 20:37:39,977 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 69 selfloop transitions, 14 changer transitions 11/95 dead transitions. [2024-11-27 20:37:39,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 863 flow [2024-11-27 20:37:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-27 20:37:39,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-11-27 20:37:39,979 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 520 flow. Second operand 5 states and 77 transitions. [2024-11-27 20:37:39,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 863 flow [2024-11-27 20:37:40,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 839 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:40,010 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 529 flow [2024-11-27 20:37:40,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-11-27 20:37:40,011 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-11-27 20:37:40,011 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 529 flow [2024-11-27 20:37:40,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:40,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:40,011 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:40,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:37:40,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:40,216 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:40,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1234504321, now seen corresponding path program 6 times [2024-11-27 20:37:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874975516] [2024-11-27 20:37:40,217 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:37:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:40,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:40,219 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:40,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:37:40,508 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:37:40,509 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:40,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:40,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:40,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:40,701 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:40,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874975516] [2024-11-27 20:37:40,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874975516] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:40,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:40,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-27 20:37:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671625097] [2024-11-27 20:37:40,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:40,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:40,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:40,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:37:40,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:40,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 529 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:40,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:40,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:40,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:41,191 INFO L124 PetriNetUnfolderBase]: 984/1427 cut-off events. [2024-11-27 20:37:41,191 INFO L125 PetriNetUnfolderBase]: For 6685/6685 co-relation queries the response was YES. [2024-11-27 20:37:41,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1427 events. 984/1427 cut-off events. For 6685/6685 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5249 event pairs, 172 based on Foata normal form. 22/1367 useless extension candidates. Maximal degree in co-relation 6468. Up to 915 conditions per place. [2024-11-27 20:37:41,201 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 72 selfloop transitions, 16 changer transitions 1/90 dead transitions. [2024-11-27 20:37:41,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 90 transitions, 841 flow [2024-11-27 20:37:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-27 20:37:41,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-11-27 20:37:41,202 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 529 flow. Second operand 5 states and 72 transitions. [2024-11-27 20:37:41,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 90 transitions, 841 flow [2024-11-27 20:37:41,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 90 transitions, 811 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:41,224 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 557 flow [2024-11-27 20:37:41,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-11-27 20:37:41,225 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-11-27 20:37:41,226 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 557 flow [2024-11-27 20:37:41,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:41,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:41,226 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:41,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:37:41,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:41,427 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:41,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 846472273, now seen corresponding path program 4 times [2024-11-27 20:37:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255954001] [2024-11-27 20:37:41,428 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:37:41,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:41,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:41,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:41,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:37:44,653 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:37:44,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:44,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:44,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:44,710 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:44,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:44,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255954001] [2024-11-27 20:37:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255954001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:44,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:44,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719043724] [2024-11-27 20:37:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:44,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:44,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:44,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:44,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:44,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 557 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:44,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:45,183 INFO L124 PetriNetUnfolderBase]: 960/1396 cut-off events. [2024-11-27 20:37:45,184 INFO L125 PetriNetUnfolderBase]: For 6803/6803 co-relation queries the response was YES. [2024-11-27 20:37:45,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6576 conditions, 1396 events. 960/1396 cut-off events. For 6803/6803 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5180 event pairs, 251 based on Foata normal form. 11/1327 useless extension candidates. Maximal degree in co-relation 6470. Up to 885 conditions per place. [2024-11-27 20:37:45,191 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 75 selfloop transitions, 13 changer transitions 8/97 dead transitions. [2024-11-27 20:37:45,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 912 flow [2024-11-27 20:37:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-27 20:37:45,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2024-11-27 20:37:45,193 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 557 flow. Second operand 5 states and 74 transitions. [2024-11-27 20:37:45,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 912 flow [2024-11-27 20:37:45,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 875 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-27 20:37:45,213 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 578 flow [2024-11-27 20:37:45,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-11-27 20:37:45,214 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-11-27 20:37:45,214 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 578 flow [2024-11-27 20:37:45,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:45,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:45,215 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:45,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:37:45,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:45,416 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:45,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash -903778327, now seen corresponding path program 5 times [2024-11-27 20:37:45,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:45,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128704569] [2024-11-27 20:37:45,417 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:37:45,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:45,419 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:45,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:37:46,567 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:37:46,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:46,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:46,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:46,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:46,773 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:46,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128704569] [2024-11-27 20:37:46,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128704569] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:37:46,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:37:46,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-27 20:37:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426818607] [2024-11-27 20:37:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:46,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:46,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:46,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:37:46,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:47,240 INFO L124 PetriNetUnfolderBase]: 921/1346 cut-off events. [2024-11-27 20:37:47,241 INFO L125 PetriNetUnfolderBase]: For 6748/6748 co-relation queries the response was YES. [2024-11-27 20:37:47,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 1346 events. 921/1346 cut-off events. For 6748/6748 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4931 event pairs, 247 based on Foata normal form. 23/1291 useless extension candidates. Maximal degree in co-relation 6502. Up to 885 conditions per place. [2024-11-27 20:37:47,250 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 80 selfloop transitions, 15 changer transitions 1/97 dead transitions. [2024-11-27 20:37:47,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 922 flow [2024-11-27 20:37:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-11-27 20:37:47,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-11-27 20:37:47,251 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 578 flow. Second operand 5 states and 77 transitions. [2024-11-27 20:37:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 922 flow [2024-11-27 20:37:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 97 transitions, 895 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-27 20:37:47,275 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 601 flow [2024-11-27 20:37:47,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-11-27 20:37:47,276 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-11-27 20:37:47,276 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 601 flow [2024-11-27 20:37:47,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:47,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:47,277 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:47,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:37:47,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:47,478 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:47,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1720212953, now seen corresponding path program 6 times [2024-11-27 20:37:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:47,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583237598] [2024-11-27 20:37:47,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:37:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:47,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:47,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:37:47,785 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:37:47,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:47,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:37:47,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-27 20:37:47,878 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:37:47,878 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583237598] [2024-11-27 20:37:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583237598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:37:47,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:37:47,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:37:47,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538472424] [2024-11-27 20:37:47,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:37:47,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:37:47,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:47,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:37:47,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:37:47,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:47,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:47,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:47,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:47,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:48,370 INFO L124 PetriNetUnfolderBase]: 878/1277 cut-off events. [2024-11-27 20:37:48,370 INFO L125 PetriNetUnfolderBase]: For 6318/6318 co-relation queries the response was YES. [2024-11-27 20:37:48,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6131 conditions, 1277 events. 878/1277 cut-off events. For 6318/6318 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4579 event pairs, 251 based on Foata normal form. 11/1214 useless extension candidates. Maximal degree in co-relation 6026. Up to 885 conditions per place. [2024-11-27 20:37:48,380 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 67 selfloop transitions, 15 changer transitions 9/92 dead transitions. [2024-11-27 20:37:48,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 92 transitions, 903 flow [2024-11-27 20:37:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:37:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:37:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-11-27 20:37:48,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-11-27 20:37:48,382 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 601 flow. Second operand 5 states and 71 transitions. [2024-11-27 20:37:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 92 transitions, 903 flow [2024-11-27 20:37:48,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 867 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-27 20:37:48,404 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 581 flow [2024-11-27 20:37:48,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=581, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2024-11-27 20:37:48,405 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-11-27 20:37:48,406 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 581 flow [2024-11-27 20:37:48,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-27 20:37:48,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:48,406 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:48,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:37:48,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:48,607 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:48,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -61183633, now seen corresponding path program 1 times [2024-11-27 20:37:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:48,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699117370] [2024-11-27 20:37:48,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:37:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:48,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:37:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:37:48,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:37:48,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 20:37:48,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 20:37:49,069 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:49,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699117370] [2024-11-27 20:37:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699117370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:37:49,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-11-27 20:37:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667813240] [2024-11-27 20:37:49,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:49,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:37:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:49,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:37:49,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:37:49,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:49,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 581 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-11-27 20:37:49,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:49,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:49,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:50,012 INFO L124 PetriNetUnfolderBase]: 2019/2915 cut-off events. [2024-11-27 20:37:50,012 INFO L125 PetriNetUnfolderBase]: For 15994/15994 co-relation queries the response was YES. [2024-11-27 20:37:50,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13548 conditions, 2915 events. 2019/2915 cut-off events. For 15994/15994 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13057 event pairs, 249 based on Foata normal form. 3/2644 useless extension candidates. Maximal degree in co-relation 13443. Up to 817 conditions per place. [2024-11-27 20:37:50,024 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 181 selfloop transitions, 8 changer transitions 105/295 dead transitions. [2024-11-27 20:37:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 295 transitions, 3504 flow [2024-11-27 20:37:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:37:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 20:37:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-11-27 20:37:50,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5663082437275986 [2024-11-27 20:37:50,025 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 581 flow. Second operand 9 states and 158 transitions. [2024-11-27 20:37:50,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 295 transitions, 3504 flow [2024-11-27 20:37:50,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 295 transitions, 3176 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-27 20:37:50,054 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 580 flow [2024-11-27 20:37:50,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2024-11-27 20:37:50,054 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-11-27 20:37:50,054 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 580 flow [2024-11-27 20:37:50,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-11-27 20:37:50,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:50,055 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:50,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:37:50,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:50,255 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:50,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1272135518, now seen corresponding path program 2 times [2024-11-27 20:37:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656531140] [2024-11-27 20:37:50,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:37:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:50,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:37:50,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:37:50,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:50,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:37:50,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 20:37:50,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-27 20:37:50,750 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:50,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656531140] [2024-11-27 20:37:50,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656531140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:37:50,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:50,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-27 20:37:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909059066] [2024-11-27 20:37:50,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:50,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:37:50,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:50,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:37:50,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:37:50,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:50,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 580 flow. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 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) [2024-11-27 20:37:50,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:50,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:50,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:51,467 INFO L124 PetriNetUnfolderBase]: 1335/1919 cut-off events. [2024-11-27 20:37:51,467 INFO L125 PetriNetUnfolderBase]: For 9180/9180 co-relation queries the response was YES. [2024-11-27 20:37:51,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9388 conditions, 1919 events. 1335/1919 cut-off events. For 9180/9180 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7110 event pairs, 706 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 9348. Up to 1904 conditions per place. [2024-11-27 20:37:51,476 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 53 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-11-27 20:37:51,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 740 flow [2024-11-27 20:37:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:37:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:37:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-27 20:37:51,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-11-27 20:37:51,478 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 580 flow. Second operand 7 states and 72 transitions. [2024-11-27 20:37:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 740 flow [2024-11-27 20:37:51,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 72 transitions, 717 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-27 20:37:51,501 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 625 flow [2024-11-27 20:37:51,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=625, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-11-27 20:37:51,502 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-11-27 20:37:51,502 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 625 flow [2024-11-27 20:37:51,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 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) [2024-11-27 20:37:51,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:51,502 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:51,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:37:51,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:51,703 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:51,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2069739991, now seen corresponding path program 3 times [2024-11-27 20:37:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:51,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637684610] [2024-11-27 20:37:51,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:51,706 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:51,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:37:51,977 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:37:51,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:51,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:37:51,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-27 20:37:52,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-27 20:37:52,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637684610] [2024-11-27 20:37:52,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637684610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:37:52,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:52,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-27 20:37:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300515150] [2024-11-27 20:37:52,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:52,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:37:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:52,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:37:52,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:37:52,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 20:37:52,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 625 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 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) [2024-11-27 20:37:52,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:37:52,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 20:37:52,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:37:53,806 INFO L124 PetriNetUnfolderBase]: 1726/2483 cut-off events. [2024-11-27 20:37:53,807 INFO L125 PetriNetUnfolderBase]: For 11722/11722 co-relation queries the response was YES. [2024-11-27 20:37:53,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11654 conditions, 2483 events. 1726/2483 cut-off events. For 11722/11722 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10230 event pairs, 249 based on Foata normal form. 1/2484 useless extension candidates. Maximal degree in co-relation 11516. Up to 820 conditions per place. [2024-11-27 20:37:53,821 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 215 selfloop transitions, 9 changer transitions 35/260 dead transitions. [2024-11-27 20:37:53,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 260 transitions, 2881 flow [2024-11-27 20:37:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:37:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:37:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-11-27 20:37:53,823 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-27 20:37:53,824 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 625 flow. Second operand 8 states and 134 transitions. [2024-11-27 20:37:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 260 transitions, 2881 flow [2024-11-27 20:37:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 260 transitions, 2845 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-27 20:37:53,857 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 621 flow [2024-11-27 20:37:53,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-11-27 20:37:53,858 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-11-27 20:37:53,858 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 621 flow [2024-11-27 20:37:53,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 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) [2024-11-27 20:37:53,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:37:53,859 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:37:53,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 20:37:54,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:54,064 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:37:54,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 247544970, now seen corresponding path program 4 times [2024-11-27 20:37:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41649143] [2024-11-27 20:37:54,065 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:37:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:54,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:54,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:54,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c54f0fe-0884-404a-9b1e-eabaa62f75b0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:37:59,459 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:37:59,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:59,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 20:37:59,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:38:02,919 INFO L349 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2024-11-27 20:38:02,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 237 treesize of output 225 [2024-11-27 20:38:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 20:38:04,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:39:23,643 WARN L286 SmtUtils]: Spent 38.45s on a formula simplification. DAG size of input: 383 DAG size of output: 380 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 20:39:23,644 INFO L349 Elim1Store]: treesize reduction 11, result has 98.8 percent of original size [2024-11-27 20:39:23,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 791 treesize of output 1292 [2024-11-27 20:39:44,977 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:40:03,054 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:40:11,087 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)