./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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1 --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 [2024-12-02 13:05:51,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:05:51,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 13:05:51,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:05:51,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:05:51,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:05:51,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:05:51,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:05:51,652 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:05:51,652 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:05:51,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:05:51,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:05:51,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:05:51,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:05:51,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:05:51,654 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:05:51,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:05:51,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:05:51,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:05:51,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:05:51,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:05:51,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:05:51,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:05:51,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:05:51,656 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1 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 [2024-12-02 13:05:51,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:05:51,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:05:51,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:05:51,872 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:05:51,873 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:05:51,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-12-02 13:05:54,616 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/ccc90e3d0/af160a1809924fa3bfd46477f8979833/FLAG89dfbcbf6 [2024-12-02 13:05:54,793 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:05:54,793 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-12-02 13:05:54,799 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/ccc90e3d0/af160a1809924fa3bfd46477f8979833/FLAG89dfbcbf6 [2024-12-02 13:05:55,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/ccc90e3d0/af160a1809924fa3bfd46477f8979833 [2024-12-02 13:05:55,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:05:55,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:05:55,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:05:55,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:05:55,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:05:55,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643ca36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55, skipping insertion in model container [2024-12-02 13:05:55,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,196 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:05:55,359 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-12-02 13:05:55,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:05:55,378 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:05:55,401 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-12-02 13:05:55,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:05:55,420 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:05:55,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55 WrapperNode [2024-12-02 13:05:55,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:05:55,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:05:55,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:05:55,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:05:55,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,435 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,458 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 265 [2024-12-02 13:05:55,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:05:55,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:05:55,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:05:55,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:05:55,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,487 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]. [2024-12-02 13:05:55,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,487 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,495 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,496 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,500 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,503 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:05:55,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:05:55,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:05:55,507 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:05:55,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (1/1) ... [2024-12-02 13:05:55,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:05:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:05:55,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:05:55,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:05:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:05:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:05:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:05:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 13:05:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:05:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 13:05:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 13:05:55,566 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 13:05:55,661 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:05:55,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:05:56,049 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:05:56,049 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:05:56,343 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:05:56,343 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 13:05:56,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:05:56 BoogieIcfgContainer [2024-12-02 13:05:56,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:05:56,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:05:56,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:05:56,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:05:56,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:05:55" (1/3) ... [2024-12-02 13:05:56,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9e7a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:05:56, skipping insertion in model container [2024-12-02 13:05:56,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:05:55" (2/3) ... [2024-12-02 13:05:56,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9e7a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:05:56, skipping insertion in model container [2024-12-02 13:05:56,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:05:56" (3/3) ... [2024-12-02 13:05:56,351 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-12-02 13:05:56,363 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:05:56,364 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. [2024-12-02 13:05:56,364 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:05:56,441 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 13:05:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-12-02 13:05:56,505 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-12-02 13:05:56,507 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:05:56,510 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. [2024-12-02 13:05:56,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-12-02 13:05:56,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-12-02 13:05:56,520 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:05:56,531 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;@6409a736, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:05:56,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 13:05:56,543 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:05:56,544 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-12-02 13:05:56,544 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:05:56,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:56,544 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] [2024-12-02 13:05:56,545 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)] === [2024-12-02 13:05:56,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash 50069996, now seen corresponding path program 1 times [2024-12-02 13:05:56,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:56,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350095425] [2024-12-02 13:05:56,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:05:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:05:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:05:57,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350095425] [2024-12-02 13:05:57,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350095425] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:57,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:05:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:05:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433462584] [2024-12-02 13:05:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:57,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:05:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:57,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:05:57,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:05:57,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:05:57,049 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) [2024-12-02 13:05:57,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:57,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:05:57,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:57,309 INFO L124 PetriNetUnfolderBase]: 341/503 cut-off events. [2024-12-02 13:05:57,309 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-12-02 13:05:57,311 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. [2024-12-02 13:05:57,315 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 36 selfloop transitions, 2 changer transitions 4/43 dead transitions. [2024-12-02 13:05:57,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 203 flow [2024-12-02 13:05:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:05:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:05:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-12-02 13:05:57,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-12-02 13:05:57,330 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 55 transitions. [2024-12-02 13:05:57,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 203 flow [2024-12-02 13:05:57,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 13:05:57,339 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 72 flow [2024-12-02 13:05:57,342 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} [2024-12-02 13:05:57,345 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-12-02 13:05:57,345 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 72 flow [2024-12-02 13:05:57,346 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) [2024-12-02 13:05:57,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:57,346 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, 1] [2024-12-02 13:05:57,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:05:57,346 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)] === [2024-12-02 13:05:57,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 880343861, now seen corresponding path program 1 times [2024-12-02 13:05:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:57,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453509972] [2024-12-02 13:05:57,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:05:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:05:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:05:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453509972] [2024-12-02 13:05:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453509972] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:05:57,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:05:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657309909] [2024-12-02 13:05:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:57,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:05:57,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:57,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:05:57,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:05:57,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:05:57,521 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) [2024-12-02 13:05:57,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:57,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:05:57,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:57,694 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2024-12-02 13:05:57,694 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-12-02 13:05:57,695 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. [2024-12-02 13:05:57,698 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2024-12-02 13:05:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 138 flow [2024-12-02 13:05:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:05:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:05:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-12-02 13:05:57,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-12-02 13:05:57,700 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 72 flow. Second operand 3 states and 44 transitions. [2024-12-02 13:05:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 138 flow [2024-12-02 13:05:57,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:05:57,702 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 102 flow [2024-12-02 13:05:57,702 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} [2024-12-02 13:05:57,702 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-12-02 13:05:57,702 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 102 flow [2024-12-02 13:05:57,703 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) [2024-12-02 13:05:57,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:57,703 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] [2024-12-02 13:05:57,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:05:57,703 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)] === [2024-12-02 13:05:57,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 451310840, now seen corresponding path program 1 times [2024-12-02 13:05:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:57,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026408926] [2024-12-02 13:05:57,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:05:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:05:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:05:57,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:57,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026408926] [2024-12-02 13:05:57,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026408926] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:05:57,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702855447] [2024-12-02 13:05:57,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:05:57,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:05:57,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:05:57,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:05:57,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:05:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:05:58,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:05:58,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:05:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:05:58,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:05:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:05:58,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702855447] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:05:58,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:05:58,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-12-02 13:05:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963826842] [2024-12-02 13:05:58,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:05:58,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 13:05:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:58,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 13:05:58,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:05:58,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:05:58,085 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) [2024-12-02 13:05:58,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:58,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:05:58,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:58,250 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2024-12-02 13:05:58,250 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-12-02 13:05:58,252 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. [2024-12-02 13:05:58,254 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2024-12-02 13:05:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 216 flow [2024-12-02 13:05:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:05:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:05:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-12-02 13:05:58,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-12-02 13:05:58,256 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 102 flow. Second operand 6 states and 71 transitions. [2024-12-02 13:05:58,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 216 flow [2024-12-02 13:05:58,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:05:58,258 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2024-12-02 13:05:58,258 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} [2024-12-02 13:05:58,258 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-12-02 13:05:58,258 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2024-12-02 13:05:58,259 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) [2024-12-02 13:05:58,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:58,259 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] [2024-12-02 13:05:58,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:05:58,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:05:58,459 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)] === [2024-12-02 13:05:58,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -874469935, now seen corresponding path program 2 times [2024-12-02 13:05:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:58,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569028887] [2024-12-02 13:05:58,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:05:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:58,521 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:05:58,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:05:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:05:58,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569028887] [2024-12-02 13:05:58,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569028887] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:58,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:05:58,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 13:05:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409333822] [2024-12-02 13:05:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:58,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:05:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:58,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:05:58,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:05:58,905 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:05:58,905 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) [2024-12-02 13:05:58,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:58,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:05:58,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:59,186 INFO L124 PetriNetUnfolderBase]: 681/1011 cut-off events. [2024-12-02 13:05:59,186 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-12-02 13:05:59,188 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. [2024-12-02 13:05:59,189 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2024-12-02 13:05:59,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 403 flow [2024-12-02 13:05:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:05:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:05:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-12-02 13:05:59,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-12-02 13:05:59,191 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 69 transitions. [2024-12-02 13:05:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 403 flow [2024-12-02 13:05:59,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 379 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-12-02 13:05:59,194 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 201 flow [2024-12-02 13:05:59,194 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} [2024-12-02 13:05:59,195 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-12-02 13:05:59,195 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 201 flow [2024-12-02 13:05:59,195 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) [2024-12-02 13:05:59,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:59,195 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] [2024-12-02 13:05:59,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 13:05:59,196 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)] === [2024-12-02 13:05:59,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1355849791, now seen corresponding path program 3 times [2024-12-02 13:05:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401380930] [2024-12-02 13:05:59,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:05:59,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:59,235 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 13:05:59,236 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:05:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:05:59,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:59,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401380930] [2024-12-02 13:05:59,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401380930] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:59,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:05:59,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 13:05:59,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478496640] [2024-12-02 13:05:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:59,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:05:59,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:59,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:05:59,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:05:59,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:05:59,543 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) [2024-12-02 13:05:59,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:59,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:05:59,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:59,859 INFO L124 PetriNetUnfolderBase]: 979/1443 cut-off events. [2024-12-02 13:05:59,859 INFO L125 PetriNetUnfolderBase]: For 693/693 co-relation queries the response was YES. [2024-12-02 13:05:59,860 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. [2024-12-02 13:05:59,863 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 61 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2024-12-02 13:05:59,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 425 flow [2024-12-02 13:05:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:05:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:05:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-12-02 13:05:59,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-12-02 13:05:59,867 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 201 flow. Second operand 4 states and 67 transitions. [2024-12-02 13:05:59,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 425 flow [2024-12-02 13:05:59,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 70 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 13:05:59,882 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 250 flow [2024-12-02 13:05:59,882 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} [2024-12-02 13:05:59,883 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2024-12-02 13:05:59,883 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 250 flow [2024-12-02 13:05:59,883 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) [2024-12-02 13:05:59,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:59,883 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] [2024-12-02 13:05:59,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 13:05:59,883 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)] === [2024-12-02 13:05:59,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1548268651, now seen corresponding path program 1 times [2024-12-02 13:05:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:59,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653514535] [2024-12-02 13:05:59,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:05:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 13:06:00,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:00,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653514535] [2024-12-02 13:06:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653514535] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:00,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669769003] [2024-12-02 13:06:00,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:06:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:00,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:00,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:00,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:06:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:00,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:06:00,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 13:06:00,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 13:06:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669769003] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:06:00,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:06:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-12-02 13:06:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143524589] [2024-12-02 13:06:00,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:06:00,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 13:06:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:00,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 13:06:00,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-12-02 13:06:00,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:00,391 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) [2024-12-02 13:06:00,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:00,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:00,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:00,661 INFO L124 PetriNetUnfolderBase]: 979/1446 cut-off events. [2024-12-02 13:06:00,662 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2024-12-02 13:06:00,663 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. [2024-12-02 13:06:00,667 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-12-02 13:06:00,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 368 flow [2024-12-02 13:06:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:06:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 13:06:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-12-02 13:06:00,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-12-02 13:06:00,668 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 250 flow. Second operand 7 states and 72 transitions. [2024-12-02 13:06:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 368 flow [2024-12-02 13:06:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 366 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-12-02 13:06:00,672 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 316 flow [2024-12-02 13:06:00,672 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} [2024-12-02 13:06:00,673 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-12-02 13:06:00,673 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 316 flow [2024-12-02 13:06:00,673 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) [2024-12-02 13:06:00,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:00,673 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] [2024-12-02 13:06:00,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 13:06:00,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:00,874 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)] === [2024-12-02 13:06:00,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash -460206650, now seen corresponding path program 2 times [2024-12-02 13:06:00,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666307123] [2024-12-02 13:06:00,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:06:00,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:00,946 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:06:00,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666307123] [2024-12-02 13:06:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666307123] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209949141] [2024-12-02 13:06:01,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:06:01,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:01,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:06:01,403 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:06:01,403 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:01,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:06:01,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:01,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:01,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209949141] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:01,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:01,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-12-02 13:06:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339049916] [2024-12-02 13:06:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:01,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:01,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:01,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 13:06:01,567 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:01,567 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) [2024-12-02 13:06:01,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:01,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:01,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:01,937 INFO L124 PetriNetUnfolderBase]: 1039/1532 cut-off events. [2024-12-02 13:06:01,938 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-12-02 13:06:01,940 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. [2024-12-02 13:06:01,945 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 77 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-12-02 13:06:01,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 617 flow [2024-12-02 13:06:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-12-02 13:06:01,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-12-02 13:06:01,948 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 316 flow. Second operand 5 states and 81 transitions. [2024-12-02 13:06:01,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 617 flow [2024-12-02 13:06:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 581 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-12-02 13:06:01,953 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 327 flow [2024-12-02 13:06:01,953 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} [2024-12-02 13:06:01,953 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-12-02 13:06:01,953 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 327 flow [2024-12-02 13:06:01,954 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) [2024-12-02 13:06:01,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:01,954 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] [2024-12-02 13:06:01,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:06:02,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:02,154 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)] === [2024-12-02 13:06:02,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash 140701694, now seen corresponding path program 1 times [2024-12-02 13:06:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:02,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331395664] [2024-12-02 13:06:02,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:06:02,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331395664] [2024-12-02 13:06:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331395664] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526152844] [2024-12-02 13:06:02,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:06:02,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:02,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:06:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:02,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 13:06:02,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 13:06:02,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526152844] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:03,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:03,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 15 [2024-12-02 13:06:03,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929836266] [2024-12-02 13:06:03,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:03,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:06:03,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:03,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:06:03,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-12-02 13:06:03,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:03,004 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) [2024-12-02 13:06:03,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:03,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:03,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:03,526 INFO L124 PetriNetUnfolderBase]: 1595/2380 cut-off events. [2024-12-02 13:06:03,526 INFO L125 PetriNetUnfolderBase]: For 4312/4312 co-relation queries the response was YES. [2024-12-02 13:06:03,531 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. [2024-12-02 13:06:03,539 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 25 changer transitions 3/121 dead transitions. [2024-12-02 13:06:03,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 121 transitions, 932 flow [2024-12-02 13:06:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:06:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:06:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-12-02 13:06:03,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.553763440860215 [2024-12-02 13:06:03,541 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 327 flow. Second operand 6 states and 103 transitions. [2024-12-02 13:06:03,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 121 transitions, 932 flow [2024-12-02 13:06:03,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 121 transitions, 892 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-12-02 13:06:03,550 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 555 flow [2024-12-02 13:06:03,550 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} [2024-12-02 13:06:03,550 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-12-02 13:06:03,550 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 555 flow [2024-12-02 13:06:03,551 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) [2024-12-02 13:06:03,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:03,551 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] [2024-12-02 13:06:03,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:06:03,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:03,751 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)] === [2024-12-02 13:06:03,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -842307088, now seen corresponding path program 2 times [2024-12-02 13:06:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707112280] [2024-12-02 13:06:03,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:06:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:03,808 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:06:03,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707112280] [2024-12-02 13:06:04,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707112280] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:04,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790176145] [2024-12-02 13:06:04,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:06:04,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:04,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:04,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:06:04,223 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:06:04,224 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:04,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:06:04,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:04,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790176145] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:04,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-12-02 13:06:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757431139] [2024-12-02 13:06:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:04,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:04,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:04,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:06:04,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:04,313 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) [2024-12-02 13:06:04,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:04,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:04,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:04,761 INFO L124 PetriNetUnfolderBase]: 1595/2374 cut-off events. [2024-12-02 13:06:04,761 INFO L125 PetriNetUnfolderBase]: For 6366/6366 co-relation queries the response was YES. [2024-12-02 13:06:04,766 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. [2024-12-02 13:06:04,774 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 79 selfloop transitions, 20 changer transitions 4/104 dead transitions. [2024-12-02 13:06:04,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 908 flow [2024-12-02 13:06:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 13:06:04,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-12-02 13:06:04,776 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 555 flow. Second operand 5 states and 77 transitions. [2024-12-02 13:06:04,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 908 flow [2024-12-02 13:06:04,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 104 transitions, 870 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-12-02 13:06:04,792 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 593 flow [2024-12-02 13:06:04,792 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} [2024-12-02 13:06:04,792 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-12-02 13:06:04,792 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 593 flow [2024-12-02 13:06:04,793 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) [2024-12-02 13:06:04,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:04,793 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] [2024-12-02 13:06:04,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:06:04,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 13:06:04,993 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)] === [2024-12-02 13:06:04,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1607560454, now seen corresponding path program 3 times [2024-12-02 13:06:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883334248] [2024-12-02 13:06:04,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:06:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:05,044 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:06:05,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:05,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:05,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883334248] [2024-12-02 13:06:05,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883334248] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:05,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:05,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992704679] [2024-12-02 13:06:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:05,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:05,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:05,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:05,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:05,261 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) [2024-12-02 13:06:05,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:05,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:05,727 INFO L124 PetriNetUnfolderBase]: 1206/1790 cut-off events. [2024-12-02 13:06:05,727 INFO L125 PetriNetUnfolderBase]: For 6565/6565 co-relation queries the response was YES. [2024-12-02 13:06:05,731 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. [2024-12-02 13:06:05,739 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 99 selfloop transitions, 10 changer transitions 16/126 dead transitions. [2024-12-02 13:06:05,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 1152 flow [2024-12-02 13:06:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-12-02 13:06:05,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-12-02 13:06:05,740 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 593 flow. Second operand 5 states and 80 transitions. [2024-12-02 13:06:05,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 1152 flow [2024-12-02 13:06:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 1102 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-12-02 13:06:05,757 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 600 flow [2024-12-02 13:06:05,757 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} [2024-12-02 13:06:05,758 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-12-02 13:06:05,758 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 600 flow [2024-12-02 13:06:05,758 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) [2024-12-02 13:06:05,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:05,758 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] [2024-12-02 13:06:05,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 13:06:05,758 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)] === [2024-12-02 13:06:05,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 153144884, now seen corresponding path program 4 times [2024-12-02 13:06:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501149016] [2024-12-02 13:06:05,759 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:06:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:05,811 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:06:05,812 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501149016] [2024-12-02 13:06:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501149016] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235761783] [2024-12-02 13:06:06,092 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:06:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:06,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:06:06,256 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:06:06,256 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:06,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:06:06,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:06,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:06,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235761783] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-12-02 13:06:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714567845] [2024-12-02 13:06:06,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:06,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:06,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:06,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:06,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-12-02 13:06:06,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:06,433 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) [2024-12-02 13:06:06,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:06,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:06,806 INFO L124 PetriNetUnfolderBase]: 1280/1896 cut-off events. [2024-12-02 13:06:06,806 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-12-02 13:06:06,811 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. [2024-12-02 13:06:06,819 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 103 selfloop transitions, 14 changer transitions 1/119 dead transitions. [2024-12-02 13:06:06,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 1060 flow [2024-12-02 13:06:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-12-02 13:06:06,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-12-02 13:06:06,821 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 600 flow. Second operand 5 states and 84 transitions. [2024-12-02 13:06:06,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 1060 flow [2024-12-02 13:06:06,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 1003 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-12-02 13:06:06,840 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 612 flow [2024-12-02 13:06:06,840 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} [2024-12-02 13:06:06,841 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-12-02 13:06:06,841 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 612 flow [2024-12-02 13:06:06,841 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) [2024-12-02 13:06:06,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:06,841 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] [2024-12-02 13:06:06,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:06:07,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 13:06:07,041 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)] === [2024-12-02 13:06:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1248665698, now seen corresponding path program 3 times [2024-12-02 13:06:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:07,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341928264] [2024-12-02 13:06:07,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:06:07,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:07,076 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:06:07,076 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:07,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:07,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341928264] [2024-12-02 13:06:07,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341928264] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:07,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297342468] [2024-12-02 13:06:07,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:06:07,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:07,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:07,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:07,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:06:07,400 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:06:07,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:07,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:06:07,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:07,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:07,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297342468] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:07,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:07,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-12-02 13:06:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919333625] [2024-12-02 13:06:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:07,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:07,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:07,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-12-02 13:06:07,558 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:07,558 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) [2024-12-02 13:06:07,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:07,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:07,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:07,952 INFO L124 PetriNetUnfolderBase]: 1460/2172 cut-off events. [2024-12-02 13:06:07,952 INFO L125 PetriNetUnfolderBase]: For 6977/6977 co-relation queries the response was YES. [2024-12-02 13:06:07,955 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. [2024-12-02 13:06:07,961 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 102 selfloop transitions, 20 changer transitions 1/124 dead transitions. [2024-12-02 13:06:07,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 124 transitions, 1122 flow [2024-12-02 13:06:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-12-02 13:06:07,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-12-02 13:06:07,962 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 612 flow. Second operand 5 states and 79 transitions. [2024-12-02 13:06:07,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 124 transitions, 1122 flow [2024-12-02 13:06:07,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 1092 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-12-02 13:06:07,982 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 702 flow [2024-12-02 13:06:07,982 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} [2024-12-02 13:06:07,983 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-12-02 13:06:07,983 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 702 flow [2024-12-02 13:06:07,983 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) [2024-12-02 13:06:07,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:07,983 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] [2024-12-02 13:06:07,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:06:08,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 13:06:08,184 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)] === [2024-12-02 13:06:08,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1228196948, now seen corresponding path program 5 times [2024-12-02 13:06:08,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:08,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916840434] [2024-12-02 13:06:08,184 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:06:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:08,223 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 13:06:08,223 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916840434] [2024-12-02 13:06:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916840434] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:08,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:08,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128050220] [2024-12-02 13:06:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:08,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:08,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:08,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:08,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:08,468 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) [2024-12-02 13:06:08,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:08,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:08,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:08,926 INFO L124 PetriNetUnfolderBase]: 1400/2074 cut-off events. [2024-12-02 13:06:08,926 INFO L125 PetriNetUnfolderBase]: For 8243/8243 co-relation queries the response was YES. [2024-12-02 13:06:08,929 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. [2024-12-02 13:06:08,933 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 99 selfloop transitions, 12 changer transitions 12/124 dead transitions. [2024-12-02 13:06:08,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1149 flow [2024-12-02 13:06:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-12-02 13:06:08,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-12-02 13:06:08,935 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 702 flow. Second operand 5 states and 79 transitions. [2024-12-02 13:06:08,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1149 flow [2024-12-02 13:06:08,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1141 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 13:06:08,948 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 728 flow [2024-12-02 13:06:08,948 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} [2024-12-02 13:06:08,948 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-12-02 13:06:08,948 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 728 flow [2024-12-02 13:06:08,948 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) [2024-12-02 13:06:08,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:08,948 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] [2024-12-02 13:06:08,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 13:06:08,949 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)] === [2024-12-02 13:06:08,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash 316596484, now seen corresponding path program 4 times [2024-12-02 13:06:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:08,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310911822] [2024-12-02 13:06:08,949 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:06:08,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:08,979 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:06:08,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:09,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:09,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310911822] [2024-12-02 13:06:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310911822] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:09,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775851852] [2024-12-02 13:06:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:09,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:09,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:09,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:09,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:09,160 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) [2024-12-02 13:06:09,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:09,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:09,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:09,584 INFO L124 PetriNetUnfolderBase]: 1290/1894 cut-off events. [2024-12-02 13:06:09,584 INFO L125 PetriNetUnfolderBase]: For 7863/7863 co-relation queries the response was YES. [2024-12-02 13:06:09,587 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. [2024-12-02 13:06:09,591 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 101 selfloop transitions, 16 changer transitions 9/127 dead transitions. [2024-12-02 13:06:09,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1182 flow [2024-12-02 13:06:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:06:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:06:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-12-02 13:06:09,593 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-12-02 13:06:09,593 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 728 flow. Second operand 6 states and 88 transitions. [2024-12-02 13:06:09,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1182 flow [2024-12-02 13:06:09,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1137 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-12-02 13:06:09,611 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 724 flow [2024-12-02 13:06:09,611 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} [2024-12-02 13:06:09,611 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-12-02 13:06:09,611 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 724 flow [2024-12-02 13:06:09,612 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) [2024-12-02 13:06:09,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:09,612 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] [2024-12-02 13:06:09,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 13:06:09,612 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)] === [2024-12-02 13:06:09,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash -607656188, now seen corresponding path program 6 times [2024-12-02 13:06:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:09,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649382820] [2024-12-02 13:06:09,612 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:06:09,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:09,653 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:06:09,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:09,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649382820] [2024-12-02 13:06:09,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649382820] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:09,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:09,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687968033] [2024-12-02 13:06:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:09,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:09,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:09,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:09,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:09,830 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) [2024-12-02 13:06:09,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:09,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:09,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:10,233 INFO L124 PetriNetUnfolderBase]: 1238/1828 cut-off events. [2024-12-02 13:06:10,233 INFO L125 PetriNetUnfolderBase]: For 8509/8509 co-relation queries the response was YES. [2024-12-02 13:06:10,238 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. [2024-12-02 13:06:10,244 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 100 selfloop transitions, 22 changer transitions 13/136 dead transitions. [2024-12-02 13:06:10,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1257 flow [2024-12-02 13:06:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:06:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 13:06:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-12-02 13:06:10,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2024-12-02 13:06:10,245 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 724 flow. Second operand 7 states and 104 transitions. [2024-12-02 13:06:10,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1257 flow [2024-12-02 13:06:10,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1214 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-12-02 13:06:10,272 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 749 flow [2024-12-02 13:06:10,272 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} [2024-12-02 13:06:10,273 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-12-02 13:06:10,273 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 749 flow [2024-12-02 13:06:10,273 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) [2024-12-02 13:06:10,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:10,273 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] [2024-12-02 13:06:10,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 13:06:10,273 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)] === [2024-12-02 13:06:10,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1790813582, now seen corresponding path program 5 times [2024-12-02 13:06:10,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:10,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074479575] [2024-12-02 13:06:10,274 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:06:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:10,314 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 13:06:10,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:10,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:10,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074479575] [2024-12-02 13:06:10,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074479575] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:10,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:10,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:10,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209904557] [2024-12-02 13:06:10,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:10,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:10,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:10,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:10,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:10,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:10,521 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) [2024-12-02 13:06:10,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:10,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:10,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:10,834 INFO L124 PetriNetUnfolderBase]: 1159/1711 cut-off events. [2024-12-02 13:06:10,834 INFO L125 PetriNetUnfolderBase]: For 8825/8825 co-relation queries the response was YES. [2024-12-02 13:06:10,837 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. [2024-12-02 13:06:10,840 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 84 selfloop transitions, 19 changer transitions 9/113 dead transitions. [2024-12-02 13:06:10,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 1123 flow [2024-12-02 13:06:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-12-02 13:06:10,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2024-12-02 13:06:10,841 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 749 flow. Second operand 5 states and 74 transitions. [2024-12-02 13:06:10,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 1123 flow [2024-12-02 13:06:10,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 1059 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-12-02 13:06:10,854 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 763 flow [2024-12-02 13:06:10,854 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} [2024-12-02 13:06:10,854 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-12-02 13:06:10,854 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 763 flow [2024-12-02 13:06:10,854 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) [2024-12-02 13:06:10,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:10,854 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] [2024-12-02 13:06:10,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 13:06:10,855 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)] === [2024-12-02 13:06:10,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash 40562982, now seen corresponding path program 6 times [2024-12-02 13:06:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:10,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019483653] [2024-12-02 13:06:10,855 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:06:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:10,896 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:06:10,896 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:11,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019483653] [2024-12-02 13:06:11,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019483653] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442063043] [2024-12-02 13:06:11,052 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:06:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:11,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:11,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:06:11,235 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:06:11,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:11,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 13:06:11,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:11,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442063043] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:11,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:06:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-12-02 13:06:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711281861] [2024-12-02 13:06:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:11,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:11,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:11,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-12-02 13:06:11,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:11,381 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) [2024-12-02 13:06:11,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:11,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:11,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:11,736 INFO L124 PetriNetUnfolderBase]: 1109/1647 cut-off events. [2024-12-02 13:06:11,736 INFO L125 PetriNetUnfolderBase]: For 8594/8594 co-relation queries the response was YES. [2024-12-02 13:06:11,739 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. [2024-12-02 13:06:11,742 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 90 selfloop transitions, 22 changer transitions 1/114 dead transitions. [2024-12-02 13:06:11,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 1152 flow [2024-12-02 13:06:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 13:06:11,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-12-02 13:06:11,744 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 763 flow. Second operand 5 states and 77 transitions. [2024-12-02 13:06:11,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 1152 flow [2024-12-02 13:06:11,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 1112 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-12-02 13:06:11,759 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 810 flow [2024-12-02 13:06:11,759 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} [2024-12-02 13:06:11,759 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-12-02 13:06:11,759 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 810 flow [2024-12-02 13:06:11,759 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) [2024-12-02 13:06:11,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:11,760 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] [2024-12-02 13:06:11,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 13:06:11,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 13:06:11,960 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)] === [2024-12-02 13:06:11,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1427586048, now seen corresponding path program 7 times [2024-12-02 13:06:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:11,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601818359] [2024-12-02 13:06:11,961 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:06:11,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601818359] [2024-12-02 13:06:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601818359] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903332512] [2024-12-02 13:06:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:12,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:12,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:12,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:12,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:12,218 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) [2024-12-02 13:06:12,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:12,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:12,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:12,534 INFO L124 PetriNetUnfolderBase]: 1053/1553 cut-off events. [2024-12-02 13:06:12,534 INFO L125 PetriNetUnfolderBase]: For 8149/8149 co-relation queries the response was YES. [2024-12-02 13:06:12,536 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. [2024-12-02 13:06:12,539 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 87 selfloop transitions, 23 changer transitions 1/112 dead transitions. [2024-12-02 13:06:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1147 flow [2024-12-02 13:06:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-12-02 13:06:12,540 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-12-02 13:06:12,540 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 810 flow. Second operand 5 states and 76 transitions. [2024-12-02 13:06:12,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1147 flow [2024-12-02 13:06:12,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 1076 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-12-02 13:06:12,554 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 778 flow [2024-12-02 13:06:12,554 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} [2024-12-02 13:06:12,555 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-12-02 13:06:12,555 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 778 flow [2024-12-02 13:06:12,555 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) [2024-12-02 13:06:12,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:12,555 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] [2024-12-02 13:06:12,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 13:06:12,555 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)] === [2024-12-02 13:06:12,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1630413034, now seen corresponding path program 7 times [2024-12-02 13:06:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575987497] [2024-12-02 13:06:12,556 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:06:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-12-02 13:06:12,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:12,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575987497] [2024-12-02 13:06:12,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575987497] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:12,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:12,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:06:12,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495660193] [2024-12-02 13:06:12,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:12,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:06:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:12,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:06:12,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:06:12,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:06:12,746 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) [2024-12-02 13:06:12,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:12,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:06:12,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:13,051 INFO L124 PetriNetUnfolderBase]: 999/1463 cut-off events. [2024-12-02 13:06:13,051 INFO L125 PetriNetUnfolderBase]: For 7006/7006 co-relation queries the response was YES. [2024-12-02 13:06:13,053 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. [2024-12-02 13:06:13,056 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 79 selfloop transitions, 21 changer transitions 10/111 dead transitions. [2024-12-02 13:06:13,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 1120 flow [2024-12-02 13:06:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:06:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:06:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-12-02 13:06:13,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-12-02 13:06:13,057 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 778 flow. Second operand 5 states and 73 transitions. [2024-12-02 13:06:13,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 1120 flow [2024-12-02 13:06:13,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 1074 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 13:06:13,068 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 762 flow [2024-12-02 13:06:13,068 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} [2024-12-02 13:06:13,068 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-12-02 13:06:13,068 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 762 flow [2024-12-02 13:06:13,068 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) [2024-12-02 13:06:13,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:13,068 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] [2024-12-02 13:06:13,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 13:06:13,069 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)] === [2024-12-02 13:06:13,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1936359968, now seen corresponding path program 1 times [2024-12-02 13:06:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983183496] [2024-12-02 13:06:13,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:06:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-12-02 13:06:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983183496] [2024-12-02 13:06:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983183496] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243509528] [2024-12-02 13:06:13,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:06:13,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:13,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:13,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:06:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:13,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 13:06:13,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:13,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:06:13,593 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 [2024-12-02 13:06:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 13:06:13,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:24,085 INFO L349 Elim1Store]: treesize reduction 28, result has 94.9 percent of original size [2024-12-02 13:06:24,086 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 [2024-12-02 13:12:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 13:12:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243509528] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:12:20,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:12:20,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 21 [2024-12-02 13:12:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701823523] [2024-12-02 13:12:20,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:12:20,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 13:12:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:12:20,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 13:12:20,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=350, Unknown=2, NotChecked=0, Total=420 [2024-12-02 13:12:20,077 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:20,077 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) [2024-12-02 13:12:20,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:20,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:22,491 INFO L124 PetriNetUnfolderBase]: 2074/3014 cut-off events. [2024-12-02 13:12:22,491 INFO L125 PetriNetUnfolderBase]: For 13721/13721 co-relation queries the response was YES. [2024-12-02 13:12:22,498 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. [2024-12-02 13:12:22,503 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 42 changer transitions 99/301 dead transitions. [2024-12-02 13:12:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 301 transitions, 3375 flow [2024-12-02 13:12:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 13:12:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 13:12:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2024-12-02 13:12:22,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-12-02 13:12:22,506 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 762 flow. Second operand 16 states and 208 transitions. [2024-12-02 13:12:22,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 301 transitions, 3375 flow [2024-12-02 13:12:22,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 301 transitions, 3065 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-12-02 13:12:22,538 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 1246 flow [2024-12-02 13:12:22,538 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} [2024-12-02 13:12:22,539 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-12-02 13:12:22,539 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 1246 flow [2024-12-02 13:12:22,539 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) [2024-12-02 13:12:22,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:22,539 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] [2024-12-02 13:12:22,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-12-02 13:12:22,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:22,740 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)] === [2024-12-02 13:12:22,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash 762418507, now seen corresponding path program 2 times [2024-12-02 13:12:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:12:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785504242] [2024-12-02 13:12:22,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:22,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:12:22,806 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:12:22,807 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-12-02 13:12:23,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:12:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785504242] [2024-12-02 13:12:23,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785504242] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:12:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031405427] [2024-12-02 13:12:23,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:23,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:23,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:23,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:12:23,273 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:12:23,273 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:23,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 13:12:23,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:23,932 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-12-02 13:12:23,932 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 [2024-12-02 13:12:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 13:12:24,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:27,767 INFO L349 Elim1Store]: treesize reduction 341, result has 75.9 percent of original size [2024-12-02 13:12:27,768 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 [2024-12-02 13:12:39,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-12-02 13:12:39,339 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-12-02 13:12:39,340 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-12-02 13:12:39,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 13:12:39,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 13:12:39,541 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/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 [2024-12-02 13:12:39,545 INFO L158 Benchmark]: Toolchain (without parser) took 404367.96ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 92.5MB in the beginning and 138.2MB in the end (delta: -45.8MB). Peak memory consumption was 281.2MB. Max. memory is 16.1GB. [2024-12-02 13:12:39,545 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 72.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 13:12:39,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.09ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 79.6MB in the end (delta: 12.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 13:12:39,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.32ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 77.0MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 13:12:39,546 INFO L158 Benchmark]: Boogie Preprocessor took 47.13ms. Allocated memory is still 117.4MB. Free memory was 77.0MB in the beginning and 74.4MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 13:12:39,546 INFO L158 Benchmark]: RCFGBuilder took 836.82ms. Allocated memory is still 117.4MB. Free memory was 74.4MB in the beginning and 39.6MB in the end (delta: 34.8MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. [2024-12-02 13:12:39,546 INFO L158 Benchmark]: TraceAbstraction took 403198.60ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 39.0MB in the beginning and 138.2MB in the end (delta: -99.2MB). Peak memory consumption was 225.8MB. Max. memory is 16.1GB. [2024-12-02 13:12:39,548 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 72.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.09ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 79.6MB in the end (delta: 12.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.32ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 77.0MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.13ms. Allocated memory is still 117.4MB. Free memory was 77.0MB in the beginning and 74.4MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 836.82ms. Allocated memory is still 117.4MB. Free memory was 74.4MB in the beginning and 39.6MB in the end (delta: 34.8MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. * TraceAbstraction took 403198.60ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 39.0MB in the beginning and 138.2MB in the end (delta: -99.2MB). Peak memory consumption was 225.8MB. 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1 --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 [2024-12-02 13:12:41,220 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:12:41,300 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-12-02 13:12:41,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:12:41,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:12:41,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:12:41,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:12:41,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:12:41,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:12:41,328 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:12:41,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:12:41,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:12:41,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:12:41,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:12:41,328 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:12:41,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:12:41,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:12:41,329 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:12:41,330 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:12:41,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:12:41,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:12:41,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:12:41,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:12:41,332 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1 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 [2024-12-02 13:12:41,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:12:41,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:12:41,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:12:41,575 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:12:41,576 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:12:41,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-12-02 13:12:44,260 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/3dfade9ef/90dd63d86f0142d191b9b33e02eb8a66/FLAG9a5f10c2a [2024-12-02 13:12:44,445 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:12:44,445 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-12-02 13:12:44,453 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/3dfade9ef/90dd63d86f0142d191b9b33e02eb8a66/FLAG9a5f10c2a [2024-12-02 13:12:44,468 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/data/3dfade9ef/90dd63d86f0142d191b9b33e02eb8a66 [2024-12-02 13:12:44,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:12:44,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:12:44,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:12:44,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:12:44,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:12:44,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f2e9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44, skipping insertion in model container [2024-12-02 13:12:44,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:12:44,670 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-12-02 13:12:44,676 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 13:12:44,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:12:44,694 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:12:44,721 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_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3136,3149] [2024-12-02 13:12:44,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:12:44,741 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:12:44,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44 WrapperNode [2024-12-02 13:12:44,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:12:44,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:12:44,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:12:44,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:12:44,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,783 INFO L138 Inliner]: procedures = 27, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 259 [2024-12-02 13:12:44,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:12:44,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:12:44,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:12:44,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:12:44,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,796 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,812 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]. [2024-12-02 13:12:44,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,823 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:12:44,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:12:44,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:12:44,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:12:44,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (1/1) ... [2024-12-02 13:12:44,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:12:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:44,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:12:44,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:12:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:12:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:12:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:12:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 13:12:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:12:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 13:12:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 13:12:44,892 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 13:12:44,982 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:12:44,984 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:12:45,455 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:12:45,455 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:12:45,886 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:12:45,886 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 13:12:45,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:12:45 BoogieIcfgContainer [2024-12-02 13:12:45,886 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:12:45,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:12:45,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:12:45,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:12:45,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:12:44" (1/3) ... [2024-12-02 13:12:45,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dea9116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:12:45, skipping insertion in model container [2024-12-02 13:12:45,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:12:44" (2/3) ... [2024-12-02 13:12:45,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dea9116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:12:45, skipping insertion in model container [2024-12-02 13:12:45,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:12:45" (3/3) ... [2024-12-02 13:12:45,895 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-12-02 13:12:45,910 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:12:45,912 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. [2024-12-02 13:12:45,912 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:12:45,992 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 13:12:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-12-02 13:12:46,055 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-12-02 13:12:46,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:12:46,060 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. [2024-12-02 13:12:46,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-12-02 13:12:46,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-12-02 13:12:46,072 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:12:46,084 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;@390cab7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:12:46,084 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 13:12:46,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:12:46,098 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-12-02 13:12:46,098 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:12:46,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:46,099 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] [2024-12-02 13:12:46,099 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)] === [2024-12-02 13:12:46,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1735075232, now seen corresponding path program 1 times [2024-12-02 13:12:46,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:46,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229743368] [2024-12-02 13:12:46,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:12:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:46,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:46,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:12:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:12:46,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 13:12:46,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:12:46,327 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:46,328 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229743368] [2024-12-02 13:12:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229743368] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:12:46,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209109198] [2024-12-02 13:12:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:46,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:12:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:46,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:12:46,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:12:46,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:46,359 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) [2024-12-02 13:12:46,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:46,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:46,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:46,670 INFO L124 PetriNetUnfolderBase]: 232/341 cut-off events. [2024-12-02 13:12:46,670 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-12-02 13:12:46,672 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. [2024-12-02 13:12:46,675 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 37 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2024-12-02 13:12:46,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 194 flow [2024-12-02 13:12:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:12:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:12:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-12-02 13:12:46,686 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2024-12-02 13:12:46,688 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 4 states and 59 transitions. [2024-12-02 13:12:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 194 flow [2024-12-02 13:12:46,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 13:12:46,695 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 87 flow [2024-12-02 13:12:46,697 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} [2024-12-02 13:12:46,700 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-12-02 13:12:46,700 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 87 flow [2024-12-02 13:12:46,700 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) [2024-12-02 13:12:46,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:46,700 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] [2024-12-02 13:12:46,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:12:46,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:46,901 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)] === [2024-12-02 13:12:46,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2057039282, now seen corresponding path program 2 times [2024-12-02 13:12:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:46,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286593628] [2024-12-02 13:12:46,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:46,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:12:47,021 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:12:47,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:47,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 13:12:47,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:12:47,137 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:47,137 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286593628] [2024-12-02 13:12:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286593628] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:47,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:47,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:12:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591509866] [2024-12-02 13:12:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:47,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:12:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:47,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:12:47,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:12:47,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:47,139 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) [2024-12-02 13:12:47,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:47,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:47,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:47,416 INFO L124 PetriNetUnfolderBase]: 361/537 cut-off events. [2024-12-02 13:12:47,417 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-12-02 13:12:47,418 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. [2024-12-02 13:12:47,422 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 46 selfloop transitions, 5 changer transitions 4/56 dead transitions. [2024-12-02 13:12:47,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 265 flow [2024-12-02 13:12:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:12:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:12:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-12-02 13:12:47,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-12-02 13:12:47,424 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 87 flow. Second operand 4 states and 70 transitions. [2024-12-02 13:12:47,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 265 flow [2024-12-02 13:12:47,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 56 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 13:12:47,427 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 112 flow [2024-12-02 13:12:47,427 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} [2024-12-02 13:12:47,428 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-12-02 13:12:47,428 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 112 flow [2024-12-02 13:12:47,428 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) [2024-12-02 13:12:47,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:47,428 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] [2024-12-02 13:12:47,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:12:47,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:47,629 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)] === [2024-12-02 13:12:47,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1240139496, now seen corresponding path program 3 times [2024-12-02 13:12:47,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:47,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294715286] [2024-12-02 13:12:47,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:12:47,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:47,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:47,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:47,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:12:47,732 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 13:12:47,732 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:47,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 13:12:47,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:12:47,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:47,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:47,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294715286] [2024-12-02 13:12:47,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294715286] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:47,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:47,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:12:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341448926] [2024-12-02 13:12:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:47,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:12:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:47,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:12:47,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:12:47,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:47,790 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) [2024-12-02 13:12:47,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:47,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:47,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:48,045 INFO L124 PetriNetUnfolderBase]: 317/470 cut-off events. [2024-12-02 13:12:48,045 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-12-02 13:12:48,047 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. [2024-12-02 13:12:48,050 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 41 selfloop transitions, 6 changer transitions 3/51 dead transitions. [2024-12-02 13:12:48,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 265 flow [2024-12-02 13:12:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:12:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:12:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 13:12:48,052 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2024-12-02 13:12:48,052 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 112 flow. Second operand 4 states and 65 transitions. [2024-12-02 13:12:48,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 265 flow [2024-12-02 13:12:48,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 252 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-12-02 13:12:48,055 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 123 flow [2024-12-02 13:12:48,055 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} [2024-12-02 13:12:48,056 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-12-02 13:12:48,056 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 123 flow [2024-12-02 13:12:48,056 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) [2024-12-02 13:12:48,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:48,056 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] [2024-12-02 13:12:48,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:12:48,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:48,257 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)] === [2024-12-02 13:12:48,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash -224168183, now seen corresponding path program 1 times [2024-12-02 13:12:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519704336] [2024-12-02 13:12:48,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:12:48,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:48,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:48,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:12:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:12:48,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:48,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:12:48,381 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:48,381 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519704336] [2024-12-02 13:12:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519704336] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:12:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482121313] [2024-12-02 13:12:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:48,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:12:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:48,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:12:48,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:12:48,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:48,382 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) [2024-12-02 13:12:48,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:48,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:48,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:48,548 INFO L124 PetriNetUnfolderBase]: 291/429 cut-off events. [2024-12-02 13:12:48,549 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-12-02 13:12:48,550 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. [2024-12-02 13:12:48,551 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-12-02 13:12:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 197 flow [2024-12-02 13:12:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:12:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:12:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-12-02 13:12:48,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-12-02 13:12:48,553 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 123 flow. Second operand 3 states and 44 transitions. [2024-12-02 13:12:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 197 flow [2024-12-02 13:12:48,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 181 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 13:12:48,556 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2024-12-02 13:12:48,556 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} [2024-12-02 13:12:48,557 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-12-02 13:12:48,557 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2024-12-02 13:12:48,557 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) [2024-12-02 13:12:48,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:48,557 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] [2024-12-02 13:12:48,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:12:48,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:48,758 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)] === [2024-12-02 13:12:48,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash -803158762, now seen corresponding path program 1 times [2024-12-02 13:12:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:48,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232741282] [2024-12-02 13:12:48,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:12:48,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:48,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:48,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:12:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:12:48,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:12:48,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:12:48,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:12:48,927 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232741282] [2024-12-02 13:12:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232741282] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:12:48,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:12:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-12-02 13:12:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616119933] [2024-12-02 13:12:48,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:12:48,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:12:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:48,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:12:48,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:12:48,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:48,929 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) [2024-12-02 13:12:48,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:48,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:48,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:49,179 INFO L124 PetriNetUnfolderBase]: 291/438 cut-off events. [2024-12-02 13:12:49,180 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-12-02 13:12:49,180 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. [2024-12-02 13:12:49,182 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 15 changer transitions 0/44 dead transitions. [2024-12-02 13:12:49,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 261 flow [2024-12-02 13:12:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:12:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:12:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-12-02 13:12:49,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-12-02 13:12:49,183 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 6 states and 71 transitions. [2024-12-02 13:12:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 261 flow [2024-12-02 13:12:49,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:12:49,186 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 229 flow [2024-12-02 13:12:49,186 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} [2024-12-02 13:12:49,187 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-12-02 13:12:49,187 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 229 flow [2024-12-02 13:12:49,187 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) [2024-12-02 13:12:49,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:49,187 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] [2024-12-02 13:12:49,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:12:49,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:49,388 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)] === [2024-12-02 13:12:49,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1310031829, now seen corresponding path program 2 times [2024-12-02 13:12:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:49,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262835544] [2024-12-02 13:12:49,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:49,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:49,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:49,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:12:49,496 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:12:49,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:49,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 13:12:49,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:49,591 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:49,591 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262835544] [2024-12-02 13:12:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262835544] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 13:12:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591193474] [2024-12-02 13:12:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:49,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:12:49,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:49,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:12:49,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:12:49,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:49,592 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) [2024-12-02 13:12:49,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:49,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:49,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:49,931 INFO L124 PetriNetUnfolderBase]: 588/866 cut-off events. [2024-12-02 13:12:49,932 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-12-02 13:12:49,933 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. [2024-12-02 13:12:49,936 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 69 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2024-12-02 13:12:49,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 503 flow [2024-12-02 13:12:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:12:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:12:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-12-02 13:12:49,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-12-02 13:12:49,938 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 229 flow. Second operand 4 states and 69 transitions. [2024-12-02 13:12:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 503 flow [2024-12-02 13:12:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 77 transitions, 479 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-12-02 13:12:49,942 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 255 flow [2024-12-02 13:12:49,942 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} [2024-12-02 13:12:49,942 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-12-02 13:12:49,942 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 255 flow [2024-12-02 13:12:49,943 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) [2024-12-02 13:12:49,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:49,943 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] [2024-12-02 13:12:49,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-12-02 13:12:50,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:50,143 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)] === [2024-12-02 13:12:50,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1446892895, now seen corresponding path program 3 times [2024-12-02 13:12:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391200992] [2024-12-02 13:12:50,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:12:50,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:50,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:50,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:12:50,244 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 13:12:50,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:50,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 13:12:50,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:50,307 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:50,307 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391200992] [2024-12-02 13:12:50,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391200992] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:50,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:50,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 13:12:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362944762] [2024-12-02 13:12:50,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:50,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 13:12:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:50,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 13:12:50,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 13:12:50,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:50,309 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) [2024-12-02 13:12:50,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:50,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:50,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:50,736 INFO L124 PetriNetUnfolderBase]: 862/1258 cut-off events. [2024-12-02 13:12:50,737 INFO L125 PetriNetUnfolderBase]: For 1354/1354 co-relation queries the response was YES. [2024-12-02 13:12:50,739 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. [2024-12-02 13:12:50,744 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 66 selfloop transitions, 9 changer transitions 1/77 dead transitions. [2024-12-02 13:12:50,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 515 flow [2024-12-02 13:12:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:12:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:12:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-12-02 13:12:50,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-12-02 13:12:50,745 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 255 flow. Second operand 4 states and 67 transitions. [2024-12-02 13:12:50,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 515 flow [2024-12-02 13:12:50,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 515 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 13:12:50,750 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 310 flow [2024-12-02 13:12:50,750 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} [2024-12-02 13:12:50,751 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-12-02 13:12:50,751 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 310 flow [2024-12-02 13:12:50,751 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) [2024-12-02 13:12:50,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:50,751 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] [2024-12-02 13:12:50,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:12:50,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:50,951 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)] === [2024-12-02 13:12:50,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 919423431, now seen corresponding path program 1 times [2024-12-02 13:12:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367529386] [2024-12-02 13:12:50,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:12:50,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:50,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:50,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:50,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:12:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:12:51,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:51,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:51,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:51,199 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367529386] [2024-12-02 13:12:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367529386] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:12:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:12:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 13:12:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197863185] [2024-12-02 13:12:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:51,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:51,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:51,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:12:51,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:51,201 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) [2024-12-02 13:12:51,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:51,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:51,572 INFO L124 PetriNetUnfolderBase]: 917/1336 cut-off events. [2024-12-02 13:12:51,572 INFO L125 PetriNetUnfolderBase]: For 2146/2146 co-relation queries the response was YES. [2024-12-02 13:12:51,575 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. [2024-12-02 13:12:51,578 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-12-02 13:12:51,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 705 flow [2024-12-02 13:12:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-12-02 13:12:51,580 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-12-02 13:12:51,580 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 310 flow. Second operand 5 states and 81 transitions. [2024-12-02 13:12:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 705 flow [2024-12-02 13:12:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 703 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-12-02 13:12:51,585 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 377 flow [2024-12-02 13:12:51,585 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} [2024-12-02 13:12:51,585 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-12-02 13:12:51,585 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 377 flow [2024-12-02 13:12:51,585 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) [2024-12-02 13:12:51,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:51,586 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] [2024-12-02 13:12:51,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 13:12:51,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:51,786 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)] === [2024-12-02 13:12:51,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1031665321, now seen corresponding path program 1 times [2024-12-02 13:12:51,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:51,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912135733] [2024-12-02 13:12:51,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:12:51,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:51,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:51,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:12:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:12:51,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:51,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:51,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:51,960 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:51,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912135733] [2024-12-02 13:12:51,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912135733] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:12:51,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:12:51,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 13:12:51,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236221139] [2024-12-02 13:12:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:51,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:51,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:51,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:12:51,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:51,961 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) [2024-12-02 13:12:51,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:51,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:51,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:52,277 INFO L124 PetriNetUnfolderBase]: 971/1412 cut-off events. [2024-12-02 13:12:52,277 INFO L125 PetriNetUnfolderBase]: For 3445/3445 co-relation queries the response was YES. [2024-12-02 13:12:52,278 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. [2024-12-02 13:12:52,282 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 73 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-12-02 13:12:52,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 696 flow [2024-12-02 13:12:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 13:12:52,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-12-02 13:12:52,283 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 377 flow. Second operand 5 states and 77 transitions. [2024-12-02 13:12:52,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 696 flow [2024-12-02 13:12:52,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 675 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-12-02 13:12:52,293 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 420 flow [2024-12-02 13:12:52,293 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} [2024-12-02 13:12:52,294 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-12-02 13:12:52,294 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 420 flow [2024-12-02 13:12:52,294 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) [2024-12-02 13:12:52,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:52,294 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] [2024-12-02 13:12:52,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 13:12:52,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:52,494 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)] === [2024-12-02 13:12:52,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -23608773, now seen corresponding path program 2 times [2024-12-02 13:12:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:52,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720842105] [2024-12-02 13:12:52,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:52,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:52,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:52,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:52,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:12:52,615 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:12:52,616 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:52,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:52,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:52,677 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:52,677 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:52,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720842105] [2024-12-02 13:12:52,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720842105] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:52,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:52,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:12:52,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899944942] [2024-12-02 13:12:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:52,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:52,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:52,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:52,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:12:52,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:52,678 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) [2024-12-02 13:12:52,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:52,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:52,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:53,021 INFO L124 PetriNetUnfolderBase]: 993/1459 cut-off events. [2024-12-02 13:12:53,021 INFO L125 PetriNetUnfolderBase]: For 4162/4162 co-relation queries the response was YES. [2024-12-02 13:12:53,023 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. [2024-12-02 13:12:53,027 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 8 changer transitions 16/102 dead transitions. [2024-12-02 13:12:53,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 846 flow [2024-12-02 13:12:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-12-02 13:12:53,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-12-02 13:12:53,028 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 420 flow. Second operand 5 states and 80 transitions. [2024-12-02 13:12:53,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 846 flow [2024-12-02 13:12:53,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 816 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-12-02 13:12:53,039 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 433 flow [2024-12-02 13:12:53,039 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} [2024-12-02 13:12:53,040 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-12-02 13:12:53,040 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 433 flow [2024-12-02 13:12:53,040 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) [2024-12-02 13:12:53,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:53,040 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] [2024-12-02 13:12:53,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 13:12:53,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:53,240 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)] === [2024-12-02 13:12:53,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash 459496593, now seen corresponding path program 3 times [2024-12-02 13:12:53,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:53,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403402595] [2024-12-02 13:12:53,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:12:53,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:53,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:53,243 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:53,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 13:12:53,364 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:12:53,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:53,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:53,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:53,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:53,533 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:53,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403402595] [2024-12-02 13:12:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403402595] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:12:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:12:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-12-02 13:12:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075742137] [2024-12-02 13:12:53,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:53,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:53,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:53,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:12:53,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:53,534 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) [2024-12-02 13:12:53,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:53,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:53,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:53,950 INFO L124 PetriNetUnfolderBase]: 1049/1539 cut-off events. [2024-12-02 13:12:53,950 INFO L125 PetriNetUnfolderBase]: For 4921/4921 co-relation queries the response was YES. [2024-12-02 13:12:53,953 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. [2024-12-02 13:12:53,957 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 86 selfloop transitions, 11 changer transitions 1/99 dead transitions. [2024-12-02 13:12:53,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 815 flow [2024-12-02 13:12:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-12-02 13:12:53,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-12-02 13:12:53,958 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 433 flow. Second operand 5 states and 84 transitions. [2024-12-02 13:12:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 815 flow [2024-12-02 13:12:53,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 795 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-12-02 13:12:53,965 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 453 flow [2024-12-02 13:12:53,965 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} [2024-12-02 13:12:53,966 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-12-02 13:12:53,966 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 453 flow [2024-12-02 13:12:53,966 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) [2024-12-02 13:12:53,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:53,966 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] [2024-12-02 13:12:53,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 13:12:54,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:54,167 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)] === [2024-12-02 13:12:54,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1995247391, now seen corresponding path program 2 times [2024-12-02 13:12:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:54,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862018799] [2024-12-02 13:12:54,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:12:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:54,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:54,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 13:12:54,295 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:12:54,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:54,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:54,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:54,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:12:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:54,426 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:54,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862018799] [2024-12-02 13:12:54,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862018799] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:12:54,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:12:54,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-12-02 13:12:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840600321] [2024-12-02 13:12:54,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:54,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:54,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:54,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:12:54,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:54,428 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) [2024-12-02 13:12:54,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:54,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:54,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:54,781 INFO L124 PetriNetUnfolderBase]: 1191/1753 cut-off events. [2024-12-02 13:12:54,781 INFO L125 PetriNetUnfolderBase]: For 5268/5268 co-relation queries the response was YES. [2024-12-02 13:12:54,785 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. [2024-12-02 13:12:54,791 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 84 selfloop transitions, 15 changer transitions 1/101 dead transitions. [2024-12-02 13:12:54,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 852 flow [2024-12-02 13:12:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-12-02 13:12:54,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-12-02 13:12:54,792 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 453 flow. Second operand 5 states and 79 transitions. [2024-12-02 13:12:54,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 852 flow [2024-12-02 13:12:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 828 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-12-02 13:12:54,805 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 501 flow [2024-12-02 13:12:54,805 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} [2024-12-02 13:12:54,805 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-12-02 13:12:54,806 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 501 flow [2024-12-02 13:12:54,806 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) [2024-12-02 13:12:54,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:54,806 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] [2024-12-02 13:12:54,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 13:12:55,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:55,006 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)] === [2024-12-02 13:12:55,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash -513894541, now seen corresponding path program 3 times [2024-12-02 13:12:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57663100] [2024-12-02 13:12:55,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:12:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:55,009 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:55,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 13:12:55,126 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:12:55,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:55,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:55,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:55,194 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:55,194 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57663100] [2024-12-02 13:12:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57663100] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:55,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:55,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:12:55,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256068288] [2024-12-02 13:12:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:55,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:55,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:55,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:12:55,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:55,195 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) [2024-12-02 13:12:55,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:55,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:55,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:55,611 INFO L124 PetriNetUnfolderBase]: 1148/1684 cut-off events. [2024-12-02 13:12:55,611 INFO L125 PetriNetUnfolderBase]: For 6097/6097 co-relation queries the response was YES. [2024-12-02 13:12:55,614 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. [2024-12-02 13:12:55,618 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 76 selfloop transitions, 11 changer transitions 11/99 dead transitions. [2024-12-02 13:12:55,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 866 flow [2024-12-02 13:12:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-12-02 13:12:55,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-12-02 13:12:55,619 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 501 flow. Second operand 5 states and 80 transitions. [2024-12-02 13:12:55,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 866 flow [2024-12-02 13:12:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 857 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 13:12:55,637 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 520 flow [2024-12-02 13:12:55,637 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} [2024-12-02 13:12:55,637 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-12-02 13:12:55,637 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 520 flow [2024-12-02 13:12:55,637 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) [2024-12-02 13:12:55,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:55,637 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] [2024-12-02 13:12:55,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-12-02 13:12:55,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:55,838 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)] === [2024-12-02 13:12:55,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2122429039, now seen corresponding path program 4 times [2024-12-02 13:12:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:55,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768397482] [2024-12-02 13:12:55,839 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:12:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:55,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:55,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 13:12:57,197 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:12:57,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:12:57,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:12:57,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:12:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:12:57,274 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:12:57,274 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:12:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768397482] [2024-12-02 13:12:57,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768397482] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:12:57,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:12:57,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:12:57,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109822143] [2024-12-02 13:12:57,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:12:57,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:12:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:12:57,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:12:57,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:12:57,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:12:57,275 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) [2024-12-02 13:12:57,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:12:57,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:12:57,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:12:57,657 INFO L124 PetriNetUnfolderBase]: 1058/1543 cut-off events. [2024-12-02 13:12:57,657 INFO L125 PetriNetUnfolderBase]: For 6188/6188 co-relation queries the response was YES. [2024-12-02 13:12:57,659 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. [2024-12-02 13:12:57,664 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 74 selfloop transitions, 11 changer transitions 9/95 dead transitions. [2024-12-02 13:12:57,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 857 flow [2024-12-02 13:12:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:12:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:12:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-12-02 13:12:57,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-12-02 13:12:57,665 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 520 flow. Second operand 5 states and 76 transitions. [2024-12-02 13:12:57,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 857 flow [2024-12-02 13:12:57,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 827 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-02 13:12:57,674 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 520 flow [2024-12-02 13:12:57,674 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} [2024-12-02 13:12:57,675 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-12-02 13:12:57,675 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 520 flow [2024-12-02 13:12:57,675 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) [2024-12-02 13:12:57,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:12:57,675 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] [2024-12-02 13:12:57,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 13:12:57,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:57,875 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)] === [2024-12-02 13:12:57,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:12:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1551997497, now seen corresponding path program 5 times [2024-12-02 13:12:57,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:12:57,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470549361] [2024-12-02 13:12:57,876 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:12:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:12:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:12:57,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:12:57,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 13:13:03,590 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 13:13:03,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:03,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:13:03,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:03,648 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:13:03,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470549361] [2024-12-02 13:13:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470549361] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:13:03,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:13:03,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:13:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363740488] [2024-12-02 13:13:03,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:13:03,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:13:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:03,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:13:03,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:13:03,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:03,649 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) [2024-12-02 13:13:03,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:03,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:04,033 INFO L124 PetriNetUnfolderBase]: 1030/1503 cut-off events. [2024-12-02 13:13:04,033 INFO L125 PetriNetUnfolderBase]: For 6819/6819 co-relation queries the response was YES. [2024-12-02 13:13:04,035 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. [2024-12-02 13:13:04,039 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 69 selfloop transitions, 14 changer transitions 11/95 dead transitions. [2024-12-02 13:13:04,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 863 flow [2024-12-02 13:13:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:13:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:13:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 13:13:04,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-12-02 13:13:04,040 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 520 flow. Second operand 5 states and 77 transitions. [2024-12-02 13:13:04,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 863 flow [2024-12-02 13:13:04,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 839 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-12-02 13:13:04,053 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 529 flow [2024-12-02 13:13:04,053 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} [2024-12-02 13:13:04,053 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-12-02 13:13:04,053 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 529 flow [2024-12-02 13:13:04,054 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) [2024-12-02 13:13:04,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:04,054 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] [2024-12-02 13:13:04,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 13:13:04,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:04,254 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)] === [2024-12-02 13:13:04,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1234504321, now seen corresponding path program 6 times [2024-12-02 13:13:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820352341] [2024-12-02 13:13:04,255 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:13:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:04,257 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 13:13:04,449 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:13:04,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:04,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:13:04,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:04,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:13:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:04,555 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:04,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820352341] [2024-12-02 13:13:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820352341] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:13:04,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:13:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-12-02 13:13:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026639439] [2024-12-02 13:13:04,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:13:04,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:13:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:04,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:13:04,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:13:04,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:04,557 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) [2024-12-02 13:13:04,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:04,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:04,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:04,913 INFO L124 PetriNetUnfolderBase]: 984/1427 cut-off events. [2024-12-02 13:13:04,913 INFO L125 PetriNetUnfolderBase]: For 6685/6685 co-relation queries the response was YES. [2024-12-02 13:13:04,915 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. [2024-12-02 13:13:04,918 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 72 selfloop transitions, 16 changer transitions 1/90 dead transitions. [2024-12-02 13:13:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 90 transitions, 841 flow [2024-12-02 13:13:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:13:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:13:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-12-02 13:13:04,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-12-02 13:13:04,919 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 529 flow. Second operand 5 states and 72 transitions. [2024-12-02 13:13:04,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 90 transitions, 841 flow [2024-12-02 13:13:04,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 90 transitions, 811 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-12-02 13:13:04,929 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 557 flow [2024-12-02 13:13:04,930 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} [2024-12-02 13:13:04,930 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-12-02 13:13:04,930 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 557 flow [2024-12-02 13:13:04,930 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) [2024-12-02 13:13:04,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:04,930 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] [2024-12-02 13:13:04,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 13:13:05,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:05,131 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)] === [2024-12-02 13:13:05,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 846472273, now seen corresponding path program 4 times [2024-12-02 13:13:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629891417] [2024-12-02 13:13:05,132 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:13:05,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:05,133 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:05,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 13:13:07,616 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:13:07,616 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:07,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:13:07,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:07,653 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:13:07,653 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629891417] [2024-12-02 13:13:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629891417] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:13:07,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:13:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:13:07,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668201826] [2024-12-02 13:13:07,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:13:07,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:13:07,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:07,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:13:07,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:13:07,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:07,654 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) [2024-12-02 13:13:07,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:07,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:07,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:07,969 INFO L124 PetriNetUnfolderBase]: 960/1396 cut-off events. [2024-12-02 13:13:07,969 INFO L125 PetriNetUnfolderBase]: For 6803/6803 co-relation queries the response was YES. [2024-12-02 13:13:07,972 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. [2024-12-02 13:13:07,975 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 75 selfloop transitions, 13 changer transitions 8/97 dead transitions. [2024-12-02 13:13:07,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 912 flow [2024-12-02 13:13:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:13:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:13:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-12-02 13:13:07,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2024-12-02 13:13:07,976 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 557 flow. Second operand 5 states and 74 transitions. [2024-12-02 13:13:07,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 912 flow [2024-12-02 13:13:07,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 875 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-12-02 13:13:07,992 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 578 flow [2024-12-02 13:13:07,992 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} [2024-12-02 13:13:07,992 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-12-02 13:13:07,992 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 578 flow [2024-12-02 13:13:07,992 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) [2024-12-02 13:13:07,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:07,993 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] [2024-12-02 13:13:08,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 13:13:08,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:08,193 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)] === [2024-12-02 13:13:08,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -903778327, now seen corresponding path program 5 times [2024-12-02 13:13:08,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067302184] [2024-12-02 13:13:08,194 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:13:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:08,196 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 13:13:09,000 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 13:13:09,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:09,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:13:09,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:09,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:13:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:09,113 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067302184] [2024-12-02 13:13:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067302184] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:13:09,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:13:09,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-12-02 13:13:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090742399] [2024-12-02 13:13:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:13:09,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:13:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:09,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:13:09,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:13:09,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:09,115 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) [2024-12-02 13:13:09,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:09,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:09,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:09,428 INFO L124 PetriNetUnfolderBase]: 921/1346 cut-off events. [2024-12-02 13:13:09,428 INFO L125 PetriNetUnfolderBase]: For 6748/6748 co-relation queries the response was YES. [2024-12-02 13:13:09,430 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. [2024-12-02 13:13:09,433 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 80 selfloop transitions, 15 changer transitions 1/97 dead transitions. [2024-12-02 13:13:09,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 922 flow [2024-12-02 13:13:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:13:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:13:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 13:13:09,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2024-12-02 13:13:09,435 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 578 flow. Second operand 5 states and 77 transitions. [2024-12-02 13:13:09,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 922 flow [2024-12-02 13:13:09,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 97 transitions, 895 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-12-02 13:13:09,445 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 601 flow [2024-12-02 13:13:09,446 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} [2024-12-02 13:13:09,446 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-12-02 13:13:09,446 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 601 flow [2024-12-02 13:13:09,446 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) [2024-12-02 13:13:09,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:09,446 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] [2024-12-02 13:13:09,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 13:13:09,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:09,647 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)] === [2024-12-02 13:13:09,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1720212953, now seen corresponding path program 6 times [2024-12-02 13:13:09,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:09,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787626787] [2024-12-02 13:13:09,647 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:13:09,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:09,649 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:09,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 13:13:09,835 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:13:09,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:09,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:13:09,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 13:13:09,896 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:13:09,896 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787626787] [2024-12-02 13:13:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787626787] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:13:09,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:13:09,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 13:13:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586741361] [2024-12-02 13:13:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:13:09,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:13:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:09,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:13:09,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 13:13:09,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:09,897 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) [2024-12-02 13:13:09,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:09,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:09,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:10,214 INFO L124 PetriNetUnfolderBase]: 878/1277 cut-off events. [2024-12-02 13:13:10,214 INFO L125 PetriNetUnfolderBase]: For 6318/6318 co-relation queries the response was YES. [2024-12-02 13:13:10,216 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. [2024-12-02 13:13:10,218 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 67 selfloop transitions, 15 changer transitions 9/92 dead transitions. [2024-12-02 13:13:10,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 92 transitions, 903 flow [2024-12-02 13:13:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:13:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:13:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-12-02 13:13:10,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-12-02 13:13:10,220 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 601 flow. Second operand 5 states and 71 transitions. [2024-12-02 13:13:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 92 transitions, 903 flow [2024-12-02 13:13:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 867 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 13:13:10,235 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 581 flow [2024-12-02 13:13:10,235 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} [2024-12-02 13:13:10,235 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-12-02 13:13:10,235 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 581 flow [2024-12-02 13:13:10,235 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) [2024-12-02 13:13:10,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:10,236 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] [2024-12-02 13:13:10,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 13:13:10,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:10,436 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)] === [2024-12-02 13:13:10,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash -61183633, now seen corresponding path program 1 times [2024-12-02 13:13:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:10,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402149910] [2024-12-02 13:13:10,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:13:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:10,438 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:10,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 13:13:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:13:10,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:13:10,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 13:13:10,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:13:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 13:13:10,705 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402149910] [2024-12-02 13:13:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402149910] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:13:10,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:13:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-12-02 13:13:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646630141] [2024-12-02 13:13:10,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:13:10,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 13:13:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:10,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 13:13:10,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:13:10,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:10,707 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) [2024-12-02 13:13:10,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:10,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:10,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:11,331 INFO L124 PetriNetUnfolderBase]: 2019/2915 cut-off events. [2024-12-02 13:13:11,331 INFO L125 PetriNetUnfolderBase]: For 15994/15994 co-relation queries the response was YES. [2024-12-02 13:13:11,336 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. [2024-12-02 13:13:11,341 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 181 selfloop transitions, 8 changer transitions 105/295 dead transitions. [2024-12-02 13:13:11,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 295 transitions, 3504 flow [2024-12-02 13:13:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 13:13:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 13:13:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-12-02 13:13:11,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5663082437275986 [2024-12-02 13:13:11,342 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 581 flow. Second operand 9 states and 158 transitions. [2024-12-02 13:13:11,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 295 transitions, 3504 flow [2024-12-02 13:13:11,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 295 transitions, 3176 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-12-02 13:13:11,357 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 580 flow [2024-12-02 13:13:11,357 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} [2024-12-02 13:13:11,358 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-12-02 13:13:11,358 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 580 flow [2024-12-02 13:13:11,358 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) [2024-12-02 13:13:11,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:11,358 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] [2024-12-02 13:13:11,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 13:13:11,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:11,558 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)] === [2024-12-02 13:13:11,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1272135518, now seen corresponding path program 2 times [2024-12-02 13:13:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:11,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634096522] [2024-12-02 13:13:11,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:13:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:11,560 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:11,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 13:13:11,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:13:11,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:11,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 13:13:11,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 13:13:11,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:13:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-12-02 13:13:11,869 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634096522] [2024-12-02 13:13:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634096522] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:13:11,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:13:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-12-02 13:13:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179256154] [2024-12-02 13:13:11,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:13:11,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 13:13:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:11,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 13:13:11,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-12-02 13:13:11,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:11,871 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) [2024-12-02 13:13:11,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:11,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:11,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:12,348 INFO L124 PetriNetUnfolderBase]: 1335/1919 cut-off events. [2024-12-02 13:13:12,348 INFO L125 PetriNetUnfolderBase]: For 9180/9180 co-relation queries the response was YES. [2024-12-02 13:13:12,351 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. [2024-12-02 13:13:12,354 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 53 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-12-02 13:13:12,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 740 flow [2024-12-02 13:13:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:13:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 13:13:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-12-02 13:13:12,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-12-02 13:13:12,356 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 580 flow. Second operand 7 states and 72 transitions. [2024-12-02 13:13:12,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 740 flow [2024-12-02 13:13:12,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 72 transitions, 717 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-12-02 13:13:12,375 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 625 flow [2024-12-02 13:13:12,375 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} [2024-12-02 13:13:12,376 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-12-02 13:13:12,376 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 625 flow [2024-12-02 13:13:12,376 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) [2024-12-02 13:13:12,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:12,376 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] [2024-12-02 13:13:12,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 13:13:12,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:12,577 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)] === [2024-12-02 13:13:12,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2069739991, now seen corresponding path program 3 times [2024-12-02 13:13:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055394768] [2024-12-02 13:13:12,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:13:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:12,579 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:12,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 13:13:12,726 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:13:12,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:12,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 13:13:12,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-12-02 13:13:12,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:13:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-12-02 13:13:12,918 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:13:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055394768] [2024-12-02 13:13:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055394768] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:13:12,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:13:12,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-12-02 13:13:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895547925] [2024-12-02 13:13:12,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:13:12,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 13:13:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:13:12,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 13:13:12,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-12-02 13:13:12,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:13:12,920 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) [2024-12-02 13:13:12,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:13:12,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:13:12,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:13:13,906 INFO L124 PetriNetUnfolderBase]: 1726/2483 cut-off events. [2024-12-02 13:13:13,906 INFO L125 PetriNetUnfolderBase]: For 11722/11722 co-relation queries the response was YES. [2024-12-02 13:13:13,910 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. [2024-12-02 13:13:13,914 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 215 selfloop transitions, 9 changer transitions 35/260 dead transitions. [2024-12-02 13:13:13,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 260 transitions, 2881 flow [2024-12-02 13:13:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 13:13:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 13:13:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-12-02 13:13:13,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-12-02 13:13:13,915 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 625 flow. Second operand 8 states and 134 transitions. [2024-12-02 13:13:13,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 260 transitions, 2881 flow [2024-12-02 13:13:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 260 transitions, 2845 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-12-02 13:13:13,930 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 621 flow [2024-12-02 13:13:13,930 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} [2024-12-02 13:13:13,931 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-12-02 13:13:13,931 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 621 flow [2024-12-02 13:13:13,931 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) [2024-12-02 13:13:13,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:13:13,931 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] [2024-12-02 13:13:13,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 13:13:14,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:14,131 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)] === [2024-12-02 13:13:14,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:13:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 247544970, now seen corresponding path program 4 times [2024-12-02 13:13:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 13:13:14,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58541243] [2024-12-02 13:13:14,132 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:13:14,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:13:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:13:14,134 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:13:14,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01dcff7-6f0a-4ecc-adac-2d4b79ac53b6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 13:13:18,139 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:13:18,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:13:18,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 13:13:18,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:13:20,330 INFO L349 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2024-12-02 13:13:20,331 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 [2024-12-02 13:13:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 13:13:21,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:35,190 WARN L286 SmtUtils]: Spent 34.30s 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) [2024-12-02 13:14:35,191 INFO L349 Elim1Store]: treesize reduction 11, result has 98.8 percent of original size [2024-12-02 13:14:35,191 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 [2024-12-02 13:14:45,574 WARN L286 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 4 DAG size of output: 1 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 13:14:56,751 WARN L286 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 4 DAG size of output: 1 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 13:15:07,200 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) [2024-12-02 13:15:22,881 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) [2024-12-02 13:15:30,906 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) [2024-12-02 13:18:35,630 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) [2024-12-02 13:18:48,184 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 13:18:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 13:18:57,282 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 13:18:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58541243] [2024-12-02 13:18:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58541243] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:18:57,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:18:57,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2024-12-02 13:18:57,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490949287] [2024-12-02 13:18:57,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 13:18:57,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 13:18:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 13:18:57,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 13:18:57,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=485, Unknown=6, NotChecked=0, Total=552 [2024-12-02 13:18:57,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-12-02 13:18:57,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 621 flow. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 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) [2024-12-02 13:18:57,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:18:57,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-12-02 13:18:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:18:58,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]