./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:02:15,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:02:15,414 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:02:15,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:02:15,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:02:15,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:02:15,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:02:15,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:02:15,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:02:15,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:02:15,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:02:15,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:02:15,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:02:15,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:02:15,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:02:15,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:02:15,480 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:02:15,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:15,481 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:02:15,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:02:15,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:02:15,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:02:15,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:15,481 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:02:15,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:02:15,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:02:15,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:02:15,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:02:15,484 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_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-28 04:02:15,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:02:15,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:02:15,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:02:15,890 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:02:15,890 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:02:15,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-28 04:02:19,485 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/6766c9d9a/598ef364dcbe43ad85215a9b7c7a35e8/FLAGe567480f1 [2024-11-28 04:02:19,856 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:02:19,857 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-28 04:02:19,868 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/6766c9d9a/598ef364dcbe43ad85215a9b7c7a35e8/FLAGe567480f1 [2024-11-28 04:02:19,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/6766c9d9a/598ef364dcbe43ad85215a9b7c7a35e8 [2024-11-28 04:02:19,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:02:19,891 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:02:19,893 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:02:19,893 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:02:19,899 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:02:19,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:02:19" (1/1) ... [2024-11-28 04:02:19,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d32f61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:19, skipping insertion in model container [2024-11-28 04:02:19,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:02:19" (1/1) ... [2024-11-28 04:02:19,928 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:02:20,153 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_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-11-28 04:02:20,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:02:20,183 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:02:20,214 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_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-11-28 04:02:20,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:02:20,241 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:02:20,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20 WrapperNode [2024-11-28 04:02:20,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:02:20,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:02:20,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:02:20,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:02:20,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,322 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 261 [2024-11-28 04:02:20,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:02:20,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:02:20,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:02:20,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:02:20,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,358 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:02:20,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,369 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:02:20,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:02:20,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:02:20,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:02:20,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (1/1) ... [2024-11-28 04:02:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:02:20,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:20,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:02:20,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:02:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:02:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:02:20,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:02:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:02:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:02:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:02:20,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:02:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:02:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:02:20,465 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:02:20,647 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:02:20,651 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:02:21,473 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:02:21,474 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:02:22,158 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:02:22,160 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:02:22,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:02:22 BoogieIcfgContainer [2024-11-28 04:02:22,160 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:02:22,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:02:22,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:02:22,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:02:22,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:02:19" (1/3) ... [2024-11-28 04:02:22,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e0f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:02:22, skipping insertion in model container [2024-11-28 04:02:22,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:02:20" (2/3) ... [2024-11-28 04:02:22,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e0f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:02:22, skipping insertion in model container [2024-11-28 04:02:22,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:02:22" (3/3) ... [2024-11-28 04:02:22,175 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-28 04:02:22,198 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:02:22,200 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 04:02:22,201 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:02:22,312 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 04:02:22,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-28 04:02:22,424 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-28 04:02:22,427 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:02:22,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-28 04:02:22,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-28 04:02:22,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-28 04:02:22,445 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:02:22,460 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;@44d8d9d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:02:22,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 04:02:22,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:02:22,485 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-28 04:02:22,486 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:02:22,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:22,486 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:22,487 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:22,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1410941413, now seen corresponding path program 1 times [2024-11-28 04:02:22,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:22,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043561811] [2024-11-28 04:02:22,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:22,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:23,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043561811] [2024-11-28 04:02:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043561811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:23,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:02:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737586438] [2024-11-28 04:02:23,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:23,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:02:23,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:23,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:02:23,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:23,566 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:23,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:23,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:23,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:23,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:24,021 INFO L124 PetriNetUnfolderBase]: 306/448 cut-off events. [2024-11-28 04:02:24,021 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-28 04:02:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 448 events. 306/448 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1211 event pairs, 124 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 786. Up to 299 conditions per place. [2024-11-28 04:02:24,035 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2024-11-28 04:02:24,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 181 flow [2024-11-28 04:02:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:02:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:02:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-28 04:02:24,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-28 04:02:24,058 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 51 transitions. [2024-11-28 04:02:24,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 181 flow [2024-11-28 04:02:24,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 163 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:02:24,074 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 72 flow [2024-11-28 04:02:24,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-11-28 04:02:24,083 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-28 04:02:24,083 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 72 flow [2024-11-28 04:02:24,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:24,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:24,084 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:24,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:02:24,084 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:24,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1884369549, now seen corresponding path program 1 times [2024-11-28 04:02:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018025127] [2024-11-28 04:02:24,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:02:24,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018025127] [2024-11-28 04:02:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018025127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:24,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:02:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405254972] [2024-11-28 04:02:24,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:24,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:02:24,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:24,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:02:24,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:02:24,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:24,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:24,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:24,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:24,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:24,715 INFO L124 PetriNetUnfolderBase]: 306/451 cut-off events. [2024-11-28 04:02:24,716 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-28 04:02:24,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 451 events. 306/451 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1191 event pairs, 202 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 271. Up to 448 conditions per place. [2024-11-28 04:02:24,724 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2024-11-28 04:02:24,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 138 flow [2024-11-28 04:02:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:02:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:02:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-11-28 04:02:24,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-28 04:02:24,728 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 72 flow. Second operand 3 states and 44 transitions. [2024-11-28 04:02:24,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 138 flow [2024-11-28 04:02:24,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:24,733 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 102 flow [2024-11-28 04:02:24,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-11-28 04:02:24,734 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-28 04:02:24,735 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 102 flow [2024-11-28 04:02:24,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:24,736 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:24,736 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:24,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:02:24,737 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:24,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -66373920, now seen corresponding path program 1 times [2024-11-28 04:02:24,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:24,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487015709] [2024-11-28 04:02:24,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:24,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487015709] [2024-11-28 04:02:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487015709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:25,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011604237] [2024-11-28 04:02:25,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:25,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:25,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:25,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:02:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:25,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:02:25,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:25,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011604237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:25,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-28 04:02:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062659192] [2024-11-28 04:02:25,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:25,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:02:25,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:25,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:02:25,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:02:25,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:25,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:25,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:25,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:25,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:25,759 INFO L124 PetriNetUnfolderBase]: 306/460 cut-off events. [2024-11-28 04:02:25,759 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-28 04:02:25,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 460 events. 306/460 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1191 event pairs, 202 based on Foata normal form. 6/386 useless extension candidates. Maximal degree in co-relation 976. Up to 448 conditions per place. [2024-11-28 04:02:25,767 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2024-11-28 04:02:25,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 216 flow [2024-11-28 04:02:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:02:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:02:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-11-28 04:02:25,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-11-28 04:02:25,772 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 102 flow. Second operand 6 states and 71 transitions. [2024-11-28 04:02:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 216 flow [2024-11-28 04:02:25,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:25,778 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2024-11-28 04:02:25,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2024-11-28 04:02:25,779 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-28 04:02:25,780 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2024-11-28 04:02:25,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:25,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:25,780 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:25,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:25,982 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:25,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash 840452941, now seen corresponding path program 2 times [2024-11-28 04:02:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773016260] [2024-11-28 04:02:25,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:26,095 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:02:26,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:02:26,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773016260] [2024-11-28 04:02:26,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773016260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:26,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:26,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:02:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685369449] [2024-11-28 04:02:26,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:26,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:02:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:26,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:02:26,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:26,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:26,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:26,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:26,981 INFO L124 PetriNetUnfolderBase]: 502/756 cut-off events. [2024-11-28 04:02:26,982 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-28 04:02:26,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 756 events. 502/756 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2524 event pairs, 202 based on Foata normal form. 17/625 useless extension candidates. Maximal degree in co-relation 1615. Up to 460 conditions per place. [2024-11-28 04:02:26,988 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 63 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2024-11-28 04:02:26,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 407 flow [2024-11-28 04:02:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:02:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:02:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-28 04:02:26,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-28 04:02:26,990 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 70 transitions. [2024-11-28 04:02:26,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 407 flow [2024-11-28 04:02:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:26,998 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 188 flow [2024-11-28 04:02:26,999 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-11-28 04:02:27,000 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-11-28 04:02:27,001 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 188 flow [2024-11-28 04:02:27,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:27,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:27,002 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:27,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:02:27,002 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:27,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 118386417, now seen corresponding path program 3 times [2024-11-28 04:02:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332203370] [2024-11-28 04:02:27,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:27,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 04:02:27,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:02:27,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332203370] [2024-11-28 04:02:27,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332203370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:27,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:27,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:02:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859814721] [2024-11-28 04:02:27,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:27,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:02:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:27,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:02:27,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:27,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:27,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:27,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:27,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:27,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:27,843 INFO L124 PetriNetUnfolderBase]: 560/838 cut-off events. [2024-11-28 04:02:27,844 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-11-28 04:02:27,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 838 events. 560/838 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2962 event pairs, 97 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 2160. Up to 567 conditions per place. [2024-11-28 04:02:27,851 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 58 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2024-11-28 04:02:27,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 394 flow [2024-11-28 04:02:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:02:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:02:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-28 04:02:27,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 04:02:27,856 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 188 flow. Second operand 4 states and 62 transitions. [2024-11-28 04:02:27,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 394 flow [2024-11-28 04:02:27,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 383 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:27,866 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 213 flow [2024-11-28 04:02:27,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-28 04:02:27,868 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-11-28 04:02:27,868 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 213 flow [2024-11-28 04:02:27,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:27,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:27,868 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:27,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:02:27,869 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:27,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1789192291, now seen corresponding path program 4 times [2024-11-28 04:02:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:27,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469649239] [2024-11-28 04:02:27,870 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:02:27,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:27,948 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:02:27,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:02:28,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469649239] [2024-11-28 04:02:28,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469649239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383611521] [2024-11-28 04:02:28,235 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:02:28,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:28,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:02:28,444 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:02:28,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:28,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:02:28,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:02:28,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:02:28,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383611521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:28,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:28,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-28 04:02:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246616440] [2024-11-28 04:02:28,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:28,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:02:28,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:28,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:02:28,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:02:28,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:28,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 213 flow. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:28,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:28,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:28,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:28,973 INFO L124 PetriNetUnfolderBase]: 560/841 cut-off events. [2024-11-28 04:02:28,974 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-11-28 04:02:28,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2372 conditions, 841 events. 560/841 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2690 event pairs, 371 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 2277. Up to 825 conditions per place. [2024-11-28 04:02:28,979 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-28 04:02:28,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 323 flow [2024-11-28 04:02:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:02:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:02:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-28 04:02:28,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-11-28 04:02:28,982 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 213 flow. Second operand 7 states and 72 transitions. [2024-11-28 04:02:28,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 323 flow [2024-11-28 04:02:28,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:28,986 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 278 flow [2024-11-28 04:02:28,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-28 04:02:28,988 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-11-28 04:02:28,989 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 278 flow [2024-11-28 04:02:28,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:28,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:28,989 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] [2024-11-28 04:02:29,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:29,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:02:29,190 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:29,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash -69888706, now seen corresponding path program 5 times [2024-11-28 04:02:29,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:29,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163184281] [2024-11-28 04:02:29,191 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:02:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:29,292 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:02:29,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:29,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:29,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163184281] [2024-11-28 04:02:29,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163184281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:29,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:29,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:02:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847736207] [2024-11-28 04:02:29,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:29,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:29,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:29,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:02:29,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:29,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:29,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:29,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:29,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:30,384 INFO L124 PetriNetUnfolderBase]: 986/1483 cut-off events. [2024-11-28 04:02:30,385 INFO L125 PetriNetUnfolderBase]: For 1258/1258 co-relation queries the response was YES. [2024-11-28 04:02:30,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 1483 events. 986/1483 cut-off events. For 1258/1258 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5992 event pairs, 359 based on Foata normal form. 16/1269 useless extension candidates. Maximal degree in co-relation 3976. Up to 869 conditions per place. [2024-11-28 04:02:30,396 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 73 selfloop transitions, 3 changer transitions 14/91 dead transitions. [2024-11-28 04:02:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 635 flow [2024-11-28 04:02:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-28 04:02:30,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-28 04:02:30,399 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 278 flow. Second operand 5 states and 80 transitions. [2024-11-28 04:02:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 635 flow [2024-11-28 04:02:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 599 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-28 04:02:30,406 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 264 flow [2024-11-28 04:02:30,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-28 04:02:30,407 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-11-28 04:02:30,407 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 264 flow [2024-11-28 04:02:30,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:30,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:30,410 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] [2024-11-28 04:02:30,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:02:30,411 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:30,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash -491978314, now seen corresponding path program 6 times [2024-11-28 04:02:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:30,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582156194] [2024-11-28 04:02:30,412 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:02:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:30,471 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 04:02:30,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:30,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582156194] [2024-11-28 04:02:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582156194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:30,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:02:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463226455] [2024-11-28 04:02:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:30,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:02:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:30,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:02:30,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:02:30,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:30,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:30,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:30,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:31,124 INFO L124 PetriNetUnfolderBase]: 780/1157 cut-off events. [2024-11-28 04:02:31,124 INFO L125 PetriNetUnfolderBase]: For 1697/1697 co-relation queries the response was YES. [2024-11-28 04:02:31,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3726 conditions, 1157 events. 780/1157 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4258 event pairs, 306 based on Foata normal form. 48/1078 useless extension candidates. Maximal degree in co-relation 3625. Up to 792 conditions per place. [2024-11-28 04:02:31,132 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 67 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2024-11-28 04:02:31,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 523 flow [2024-11-28 04:02:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:02:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:02:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-28 04:02:31,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-28 04:02:31,134 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 264 flow. Second operand 4 states and 66 transitions. [2024-11-28 04:02:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 523 flow [2024-11-28 04:02:31,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 506 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-28 04:02:31,140 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 281 flow [2024-11-28 04:02:31,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-11-28 04:02:31,141 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-11-28 04:02:31,141 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 281 flow [2024-11-28 04:02:31,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:31,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:31,141 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:31,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 04:02:31,142 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:31,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1590090959, now seen corresponding path program 1 times [2024-11-28 04:02:31,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:31,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130475463] [2024-11-28 04:02:31,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:31,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130475463] [2024-11-28 04:02:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130475463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:31,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:31,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:02:31,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489491623] [2024-11-28 04:02:31,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:31,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:31,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:31,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:02:31,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:31,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:31,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:31,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:31,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:32,335 INFO L124 PetriNetUnfolderBase]: 952/1406 cut-off events. [2024-11-28 04:02:32,335 INFO L125 PetriNetUnfolderBase]: For 2537/2537 co-relation queries the response was YES. [2024-11-28 04:02:32,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1406 events. 952/1406 cut-off events. For 2537/2537 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5438 event pairs, 267 based on Foata normal form. 24/1287 useless extension candidates. Maximal degree in co-relation 4480. Up to 728 conditions per place. [2024-11-28 04:02:32,343 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 82 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-11-28 04:02:32,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 635 flow [2024-11-28 04:02:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-28 04:02:32,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-28 04:02:32,344 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 281 flow. Second operand 5 states and 80 transitions. [2024-11-28 04:02:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 635 flow [2024-11-28 04:02:32,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 595 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 04:02:32,352 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 307 flow [2024-11-28 04:02:32,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-28 04:02:32,353 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-11-28 04:02:32,353 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 307 flow [2024-11-28 04:02:32,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:32,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:32,353 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:32,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:02:32,354 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:32,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -665560037, now seen corresponding path program 2 times [2024-11-28 04:02:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762971956] [2024-11-28 04:02:32,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:32,444 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:32,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762971956] [2024-11-28 04:02:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762971956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388761882] [2024-11-28 04:02:32,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:32,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:32,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:32,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:02:33,097 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:33,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:33,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:02:33,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:33,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388761882] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:02:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-28 04:02:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628729108] [2024-11-28 04:02:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:33,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:33,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:33,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:02:33,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:33,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:33,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:33,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:33,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:33,779 INFO L124 PetriNetUnfolderBase]: 1006/1482 cut-off events. [2024-11-28 04:02:33,780 INFO L125 PetriNetUnfolderBase]: For 2848/2848 co-relation queries the response was YES. [2024-11-28 04:02:33,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1482 events. 1006/1482 cut-off events. For 2848/2848 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5652 event pairs, 158 based on Foata normal form. 22/1357 useless extension candidates. Maximal degree in co-relation 5003. Up to 615 conditions per place. [2024-11-28 04:02:33,849 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 8 changer transitions 4/99 dead transitions. [2024-11-28 04:02:33,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 747 flow [2024-11-28 04:02:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-28 04:02:33,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-28 04:02:33,850 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 307 flow. Second operand 5 states and 76 transitions. [2024-11-28 04:02:33,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 747 flow [2024-11-28 04:02:33,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:02:33,861 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 361 flow [2024-11-28 04:02:33,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-28 04:02:33,862 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-11-28 04:02:33,863 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 361 flow [2024-11-28 04:02:33,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:33,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:33,864 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:33,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:02:34,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:02:34,065 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:34,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1812027913, now seen corresponding path program 3 times [2024-11-28 04:02:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19191743] [2024-11-28 04:02:34,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:34,165 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:02:34,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19191743] [2024-11-28 04:02:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19191743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:02:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671069388] [2024-11-28 04:02:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:34,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:34,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:34,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:02:34,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:34,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:34,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:34,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:34,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:34,974 INFO L124 PetriNetUnfolderBase]: 962/1411 cut-off events. [2024-11-28 04:02:34,974 INFO L125 PetriNetUnfolderBase]: For 3508/3508 co-relation queries the response was YES. [2024-11-28 04:02:34,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 1411 events. 962/1411 cut-off events. For 3508/3508 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5345 event pairs, 285 based on Foata normal form. 22/1290 useless extension candidates. Maximal degree in co-relation 4966. Up to 750 conditions per place. [2024-11-28 04:02:34,986 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 10 changer transitions 4/92 dead transitions. [2024-11-28 04:02:34,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 697 flow [2024-11-28 04:02:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-28 04:02:34,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-11-28 04:02:34,988 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 361 flow. Second operand 5 states and 81 transitions. [2024-11-28 04:02:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 697 flow [2024-11-28 04:02:34,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 682 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 04:02:35,002 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 379 flow [2024-11-28 04:02:35,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-28 04:02:35,004 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-11-28 04:02:35,004 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 379 flow [2024-11-28 04:02:35,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:35,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:35,005 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:35,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 04:02:35,005 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:35,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1829535043, now seen corresponding path program 4 times [2024-11-28 04:02:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044769765] [2024-11-28 04:02:35,006 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:02:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:35,069 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:02:35,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:35,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044769765] [2024-11-28 04:02:35,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044769765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:02:35,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:02:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:02:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325311158] [2024-11-28 04:02:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:35,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:35,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:35,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:35,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:02:35,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:35,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:35,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:35,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:35,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:36,058 INFO L124 PetriNetUnfolderBase]: 906/1330 cut-off events. [2024-11-28 04:02:36,058 INFO L125 PetriNetUnfolderBase]: For 3718/3718 co-relation queries the response was YES. [2024-11-28 04:02:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1330 events. 906/1330 cut-off events. For 3718/3718 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4827 event pairs, 290 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 4809. Up to 900 conditions per place. [2024-11-28 04:02:36,068 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 71 selfloop transitions, 8 changer transitions 14/94 dead transitions. [2024-11-28 04:02:36,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 753 flow [2024-11-28 04:02:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-28 04:02:36,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-28 04:02:36,071 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 379 flow. Second operand 5 states and 76 transitions. [2024-11-28 04:02:36,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 753 flow [2024-11-28 04:02:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 721 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 04:02:36,083 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 429 flow [2024-11-28 04:02:36,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-28 04:02:36,086 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-11-28 04:02:36,087 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 429 flow [2024-11-28 04:02:36,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:36,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:36,087 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:36,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:02:36,088 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:36,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1363237617, now seen corresponding path program 5 times [2024-11-28 04:02:36,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870015010] [2024-11-28 04:02:36,089 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:02:36,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:36,173 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:02:36,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870015010] [2024-11-28 04:02:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870015010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992027919] [2024-11-28 04:02:36,550 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:02:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:36,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:02:37,175 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:02:37,175 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:37,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:02:37,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:37,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992027919] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:37,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:02:37,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 8] total 15 [2024-11-28 04:02:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762742955] [2024-11-28 04:02:37,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:37,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:02:37,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:37,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:02:37,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:02:37,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:37,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 429 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:37,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:37,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:37,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:38,327 INFO L124 PetriNetUnfolderBase]: 1350/1958 cut-off events. [2024-11-28 04:02:38,328 INFO L125 PetriNetUnfolderBase]: For 4546/4546 co-relation queries the response was YES. [2024-11-28 04:02:38,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 1958 events. 1350/1958 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8019 event pairs, 154 based on Foata normal form. 1/1736 useless extension candidates. Maximal degree in co-relation 7015. Up to 1137 conditions per place. [2024-11-28 04:02:38,344 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 101 selfloop transitions, 26 changer transitions 4/132 dead transitions. [2024-11-28 04:02:38,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 1128 flow [2024-11-28 04:02:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:02:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:02:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-11-28 04:02:38,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2024-11-28 04:02:38,346 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 429 flow. Second operand 6 states and 94 transitions. [2024-11-28 04:02:38,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 1128 flow [2024-11-28 04:02:38,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 132 transitions, 1080 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-28 04:02:38,364 INFO L231 Difference]: Finished difference. Result has 74 places, 84 transitions, 719 flow [2024-11-28 04:02:38,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=74, PETRI_TRANSITIONS=84} [2024-11-28 04:02:38,365 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-11-28 04:02:38,365 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 84 transitions, 719 flow [2024-11-28 04:02:38,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:38,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:38,366 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:38,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:38,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:02:38,567 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:38,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1505122721, now seen corresponding path program 6 times [2024-11-28 04:02:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170180862] [2024-11-28 04:02:38,569 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:02:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:38,659 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:02:38,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170180862] [2024-11-28 04:02:39,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170180862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:39,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324290875] [2024-11-28 04:02:39,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:02:39,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:39,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:39,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:02:39,329 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:02:39,329 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:39,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:02:39,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:39,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 04:02:39,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324290875] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:39,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:02:39,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-28 04:02:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112986799] [2024-11-28 04:02:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:02:39,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:02:39,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:39,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:02:39,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:02:39,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:39,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 84 transitions, 719 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:39,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:39,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:39,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:40,109 INFO L124 PetriNetUnfolderBase]: 1312/1898 cut-off events. [2024-11-28 04:02:40,109 INFO L125 PetriNetUnfolderBase]: For 7582/7582 co-relation queries the response was YES. [2024-11-28 04:02:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 1898 events. 1312/1898 cut-off events. For 7582/7582 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7457 event pairs, 202 based on Foata normal form. 36/1833 useless extension candidates. Maximal degree in co-relation 7729. Up to 1186 conditions per place. [2024-11-28 04:02:40,124 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 85 selfloop transitions, 26 changer transitions 1/113 dead transitions. [2024-11-28 04:02:40,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 1103 flow [2024-11-28 04:02:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:02:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:02:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-28 04:02:40,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-11-28 04:02:40,125 INFO L175 Difference]: Start difference. First operand has 74 places, 84 transitions, 719 flow. Second operand 5 states and 72 transitions. [2024-11-28 04:02:40,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 1103 flow [2024-11-28 04:02:40,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 1085 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 04:02:40,147 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 773 flow [2024-11-28 04:02:40,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=773, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-11-28 04:02:40,147 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-11-28 04:02:40,147 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 773 flow [2024-11-28 04:02:40,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:40,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:40,148 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:40,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:40,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:02:40,352 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:40,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1472193077, now seen corresponding path program 1 times [2024-11-28 04:02:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:40,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577242320] [2024-11-28 04:02:40,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 04:02:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577242320] [2024-11-28 04:02:43,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577242320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:43,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241277748] [2024-11-28 04:02:43,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:02:43,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:43,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:43,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:02:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:43,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:02:43,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:44,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:44,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-28 04:02:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:44,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:45,334 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:02:45,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:02:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241277748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:45,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:45,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 37 [2024-11-28 04:02:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725158384] [2024-11-28 04:02:45,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:45,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 04:02:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:45,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 04:02:45,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:02:45,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:45,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 773 flow. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:45,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:45,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:45,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:50,741 INFO L124 PetriNetUnfolderBase]: 2696/3913 cut-off events. [2024-11-28 04:02:50,741 INFO L125 PetriNetUnfolderBase]: For 14953/14953 co-relation queries the response was YES. [2024-11-28 04:02:50,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16156 conditions, 3913 events. 2696/3913 cut-off events. For 14953/14953 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 18440 event pairs, 292 based on Foata normal form. 1/3657 useless extension candidates. Maximal degree in co-relation 16040. Up to 1336 conditions per place. [2024-11-28 04:02:50,776 INFO L140 encePairwiseOnDemand]: 14/31 looper letters, 157 selfloop transitions, 116 changer transitions 14/288 dead transitions. [2024-11-28 04:02:50,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 288 transitions, 2801 flow [2024-11-28 04:02:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:02:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 04:02:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 306 transitions. [2024-11-28 04:02:50,780 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2024-11-28 04:02:50,780 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 773 flow. Second operand 30 states and 306 transitions. [2024-11-28 04:02:50,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 288 transitions, 2801 flow [2024-11-28 04:02:50,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 288 transitions, 2682 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-28 04:02:50,892 INFO L231 Difference]: Finished difference. Result has 109 places, 173 transitions, 1942 flow [2024-11-28 04:02:50,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1942, PETRI_PLACES=109, PETRI_TRANSITIONS=173} [2024-11-28 04:02:50,894 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-11-28 04:02:50,894 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 173 transitions, 1942 flow [2024-11-28 04:02:50,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:50,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:50,894 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:50,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:02:51,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:02:51,099 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:51,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -435464253, now seen corresponding path program 2 times [2024-11-28 04:02:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484196825] [2024-11-28 04:02:51,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:51,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:51,246 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:51,246 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484196825] [2024-11-28 04:02:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484196825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258868593] [2024-11-28 04:02:52,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:02:52,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:52,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:02:52,681 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:02:52,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:52,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:02:52,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:53,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:53,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-28 04:02:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:53,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:53,849 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:02:53,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:02:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:54,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258868593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:54,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:54,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2024-11-28 04:02:54,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011851611] [2024-11-28 04:02:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:54,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:02:54,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:54,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:02:54,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:02:54,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:02:54,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 173 transitions, 1942 flow. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:54,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:54,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:02:54,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:57,197 INFO L124 PetriNetUnfolderBase]: 2980/4323 cut-off events. [2024-11-28 04:02:57,197 INFO L125 PetriNetUnfolderBase]: For 23702/23702 co-relation queries the response was YES. [2024-11-28 04:02:57,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21230 conditions, 4323 events. 2980/4323 cut-off events. For 23702/23702 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 20937 event pairs, 266 based on Foata normal form. 1/4302 useless extension candidates. Maximal degree in co-relation 21091. Up to 1376 conditions per place. [2024-11-28 04:02:57,235 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 209 selfloop transitions, 166 changer transitions 64/440 dead transitions. [2024-11-28 04:02:57,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 440 transitions, 4984 flow [2024-11-28 04:02:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:02:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 04:02:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 357 transitions. [2024-11-28 04:02:57,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37148803329864727 [2024-11-28 04:02:57,239 INFO L175 Difference]: Start difference. First operand has 109 places, 173 transitions, 1942 flow. Second operand 31 states and 357 transitions. [2024-11-28 04:02:57,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 440 transitions, 4984 flow [2024-11-28 04:02:57,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 440 transitions, 4803 flow, removed 63 selfloop flow, removed 10 redundant places. [2024-11-28 04:02:57,371 INFO L231 Difference]: Finished difference. Result has 144 places, 250 transitions, 3152 flow [2024-11-28 04:02:57,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3152, PETRI_PLACES=144, PETRI_TRANSITIONS=250} [2024-11-28 04:02:57,372 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 113 predicate places. [2024-11-28 04:02:57,372 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 250 transitions, 3152 flow [2024-11-28 04:02:57,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:57,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:57,373 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:57,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:02:57,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:02:57,573 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:02:57,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1811630423, now seen corresponding path program 3 times [2024-11-28 04:02:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490011947] [2024-11-28 04:02:57,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:57,654 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:02:57,654 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490011947] [2024-11-28 04:02:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490011947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325430431] [2024-11-28 04:02:58,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:02:58,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:58,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:58,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:58,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:02:59,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:02:59,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:59,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:02:59,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:59,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:59,362 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 40 [2024-11-28 04:02:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:02:59,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:00,119 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:00,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:00,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325430431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:00,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:00,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2024-11-28 04:03:00,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726816014] [2024-11-28 04:03:00,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:00,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:03:00,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:00,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:03:00,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:03:00,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:00,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 250 transitions, 3152 flow. Second operand has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:00,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:00,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:03,368 INFO L124 PetriNetUnfolderBase]: 2746/3993 cut-off events. [2024-11-28 04:03:03,368 INFO L125 PetriNetUnfolderBase]: For 66555/66555 co-relation queries the response was YES. [2024-11-28 04:03:03,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29026 conditions, 3993 events. 2746/3993 cut-off events. For 66555/66555 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 19097 event pairs, 294 based on Foata normal form. 3/3996 useless extension candidates. Maximal degree in co-relation 28905. Up to 1360 conditions per place. [2024-11-28 04:03:03,409 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 224 selfloop transitions, 155 changer transitions 7/387 dead transitions. [2024-11-28 04:03:03,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 387 transitions, 5300 flow [2024-11-28 04:03:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:03:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 04:03:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 266 transitions. [2024-11-28 04:03:03,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37307152875175315 [2024-11-28 04:03:03,412 INFO L175 Difference]: Start difference. First operand has 144 places, 250 transitions, 3152 flow. Second operand 23 states and 266 transitions. [2024-11-28 04:03:03,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 387 transitions, 5300 flow [2024-11-28 04:03:03,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 387 transitions, 5002 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-11-28 04:03:03,775 INFO L231 Difference]: Finished difference. Result has 159 places, 262 transitions, 3402 flow [2024-11-28 04:03:03,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3402, PETRI_PLACES=159, PETRI_TRANSITIONS=262} [2024-11-28 04:03:03,776 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 128 predicate places. [2024-11-28 04:03:03,776 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 262 transitions, 3402 flow [2024-11-28 04:03:03,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:03,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:03,777 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:03,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:03:03,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:03:03,982 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:03:03,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2047779421, now seen corresponding path program 4 times [2024-11-28 04:03:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969509462] [2024-11-28 04:03:03,983 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:03:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:04,107 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:03:04,107 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:05,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:03:05,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969509462] [2024-11-28 04:03:05,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969509462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:03:05,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677745445] [2024-11-28 04:03:05,607 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:03:05,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:05,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:05,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:03:05,894 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:03:05,894 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:05,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:03:05,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:06,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:03:06,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-28 04:03:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:06,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:10,968 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:10,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677745445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:11,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 28 [2024-11-28 04:03:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518832550] [2024-11-28 04:03:11,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:11,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:03:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:11,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:03:11,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=652, Unknown=1, NotChecked=0, Total=756 [2024-11-28 04:03:11,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:11,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 262 transitions, 3402 flow. Second operand has 28 states, 28 states have (on average 6.107142857142857) internal successors, (171), 28 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:11,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:11,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:11,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:15,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:03:19,569 INFO L124 PetriNetUnfolderBase]: 2756/4015 cut-off events. [2024-11-28 04:03:19,569 INFO L125 PetriNetUnfolderBase]: For 88186/88186 co-relation queries the response was YES. [2024-11-28 04:03:19,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31433 conditions, 4015 events. 2756/4015 cut-off events. For 88186/88186 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 19098 event pairs, 427 based on Foata normal form. 1/4005 useless extension candidates. Maximal degree in co-relation 31308. Up to 1487 conditions per place. [2024-11-28 04:03:19,625 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 156 changer transitions 4/352 dead transitions. [2024-11-28 04:03:19,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 352 transitions, 4960 flow [2024-11-28 04:03:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:03:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 04:03:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 225 transitions. [2024-11-28 04:03:19,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38200339558573854 [2024-11-28 04:03:19,631 INFO L175 Difference]: Start difference. First operand has 159 places, 262 transitions, 3402 flow. Second operand 19 states and 225 transitions. [2024-11-28 04:03:19,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 352 transitions, 4960 flow [2024-11-28 04:03:20,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 352 transitions, 4669 flow, removed 61 selfloop flow, removed 13 redundant places. [2024-11-28 04:03:20,148 INFO L231 Difference]: Finished difference. Result has 165 places, 264 transitions, 3470 flow [2024-11-28 04:03:20,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3470, PETRI_PLACES=165, PETRI_TRANSITIONS=264} [2024-11-28 04:03:20,149 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 134 predicate places. [2024-11-28 04:03:20,149 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 264 transitions, 3470 flow [2024-11-28 04:03:20,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.107142857142857) internal successors, (171), 28 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:20,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:20,150 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:20,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:03:20,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:03:20,354 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:03:20,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1629972825, now seen corresponding path program 5 times [2024-11-28 04:03:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:20,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261625447] [2024-11-28 04:03:20,355 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:03:20,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:20,448 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:03:20,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:03:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:03:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261625447] [2024-11-28 04:03:22,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261625447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:03:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683579663] [2024-11-28 04:03:22,293 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:03:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:22,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:22,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:03:23,040 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:03:23,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:23,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:03:23,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:23,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:03:23,684 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 48 [2024-11-28 04:03:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:23,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:24,697 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:24,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683579663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:24,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:24,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 30 [2024-11-28 04:03:24,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090324296] [2024-11-28 04:03:24,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:24,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:03:24,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:24,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:03:24,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:03:24,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:24,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 264 transitions, 3470 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:24,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:24,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:24,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:28,678 INFO L124 PetriNetUnfolderBase]: 3062/4453 cut-off events. [2024-11-28 04:03:28,678 INFO L125 PetriNetUnfolderBase]: For 99170/99170 co-relation queries the response was YES. [2024-11-28 04:03:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35376 conditions, 4453 events. 3062/4453 cut-off events. For 99170/99170 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21424 event pairs, 362 based on Foata normal form. 1/4454 useless extension candidates. Maximal degree in co-relation 35250. Up to 1384 conditions per place. [2024-11-28 04:03:28,707 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 241 selfloop transitions, 176 changer transitions 19/437 dead transitions. [2024-11-28 04:03:28,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 437 transitions, 6336 flow [2024-11-28 04:03:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:03:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 04:03:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 291 transitions. [2024-11-28 04:03:28,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-11-28 04:03:28,712 INFO L175 Difference]: Start difference. First operand has 165 places, 264 transitions, 3470 flow. Second operand 24 states and 291 transitions. [2024-11-28 04:03:28,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 437 transitions, 6336 flow [2024-11-28 04:03:28,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 437 transitions, 6086 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-11-28 04:03:28,992 INFO L231 Difference]: Finished difference. Result has 182 places, 306 transitions, 4379 flow [2024-11-28 04:03:28,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4379, PETRI_PLACES=182, PETRI_TRANSITIONS=306} [2024-11-28 04:03:28,993 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 151 predicate places. [2024-11-28 04:03:28,993 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 306 transitions, 4379 flow [2024-11-28 04:03:28,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:28,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:28,993 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:29,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:03:29,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:29,194 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:03:29,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash 102391325, now seen corresponding path program 6 times [2024-11-28 04:03:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:29,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703735793] [2024-11-28 04:03:29,195 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:03:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:29,261 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:03:29,261 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:03:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703735793] [2024-11-28 04:03:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703735793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:03:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766221978] [2024-11-28 04:03:30,865 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:03:30,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:30,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:30,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:03:31,132 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:03:31,132 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:31,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:03:31,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:31,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:03:31,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2024-11-28 04:03:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:31,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:32,745 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:32,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:33,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766221978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:33,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:33,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2024-11-28 04:03:33,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585259550] [2024-11-28 04:03:33,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:33,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:03:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:33,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:03:33,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:03:33,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:33,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 306 transitions, 4379 flow. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:33,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:33,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:33,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:37,184 INFO L124 PetriNetUnfolderBase]: 3071/4476 cut-off events. [2024-11-28 04:03:37,184 INFO L125 PetriNetUnfolderBase]: For 139114/139114 co-relation queries the response was YES. [2024-11-28 04:03:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39071 conditions, 4476 events. 3071/4476 cut-off events. For 139114/139114 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21821 event pairs, 326 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 38931. Up to 1396 conditions per place. [2024-11-28 04:03:37,217 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 277 selfloop transitions, 172 changer transitions 9/459 dead transitions. [2024-11-28 04:03:37,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 459 transitions, 7290 flow [2024-11-28 04:03:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:03:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 04:03:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 304 transitions. [2024-11-28 04:03:37,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3632019115890084 [2024-11-28 04:03:37,219 INFO L175 Difference]: Start difference. First operand has 182 places, 306 transitions, 4379 flow. Second operand 27 states and 304 transitions. [2024-11-28 04:03:37,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 459 transitions, 7290 flow [2024-11-28 04:03:37,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 459 transitions, 7078 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-11-28 04:03:37,580 INFO L231 Difference]: Finished difference. Result has 205 places, 333 transitions, 5185 flow [2024-11-28 04:03:37,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5185, PETRI_PLACES=205, PETRI_TRANSITIONS=333} [2024-11-28 04:03:37,581 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2024-11-28 04:03:37,581 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 333 transitions, 5185 flow [2024-11-28 04:03:37,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:37,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:37,581 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:37,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:03:37,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-28 04:03:37,782 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:03:37,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -328495485, now seen corresponding path program 7 times [2024-11-28 04:03:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094620374] [2024-11-28 04:03:37,783 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:03:37,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:03:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:39,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:03:39,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094620374] [2024-11-28 04:03:39,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094620374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:03:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893713472] [2024-11-28 04:03:39,473 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:03:39,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:39,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:39,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:39,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:03:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:03:39,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:03:39,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:40,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:03:40,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-28 04:03:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:40,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:41,517 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:41,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:41,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893713472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:41,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:41,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-11-28 04:03:41,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582732745] [2024-11-28 04:03:41,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:41,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:03:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:41,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:03:41,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:03:41,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:41,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 333 transitions, 5185 flow. Second operand has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:41,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:41,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:41,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:46,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:03:50,365 INFO L124 PetriNetUnfolderBase]: 3096/4523 cut-off events. [2024-11-28 04:03:50,366 INFO L125 PetriNetUnfolderBase]: For 178380/178380 co-relation queries the response was YES. [2024-11-28 04:03:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42843 conditions, 4523 events. 3096/4523 cut-off events. For 178380/178380 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22068 event pairs, 471 based on Foata normal form. 1/4524 useless extension candidates. Maximal degree in co-relation 42702. Up to 2018 conditions per place. [2024-11-28 04:03:50,424 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 272 selfloop transitions, 148 changer transitions 7/428 dead transitions. [2024-11-28 04:03:50,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 428 transitions, 7185 flow [2024-11-28 04:03:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:03:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 04:03:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 222 transitions. [2024-11-28 04:03:50,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3769100169779287 [2024-11-28 04:03:50,426 INFO L175 Difference]: Start difference. First operand has 205 places, 333 transitions, 5185 flow. Second operand 19 states and 222 transitions. [2024-11-28 04:03:50,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 428 transitions, 7185 flow [2024-11-28 04:03:50,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 428 transitions, 6628 flow, removed 170 selfloop flow, removed 15 redundant places. [2024-11-28 04:03:50,926 INFO L231 Difference]: Finished difference. Result has 211 places, 344 transitions, 5228 flow [2024-11-28 04:03:50,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5228, PETRI_PLACES=211, PETRI_TRANSITIONS=344} [2024-11-28 04:03:50,927 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2024-11-28 04:03:50,927 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 344 transitions, 5228 flow [2024-11-28 04:03:50,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:50,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:50,928 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:50,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:03:51,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:03:51,129 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:03:51,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash 954290769, now seen corresponding path program 8 times [2024-11-28 04:03:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845724739] [2024-11-28 04:03:51,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:03:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:51,271 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:03:51,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:52,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:03:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845724739] [2024-11-28 04:03:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845724739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:03:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803100787] [2024-11-28 04:03:52,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:03:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:03:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:03:52,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:03:52,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:03:53,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:03:53,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:03:53,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:03:53,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:03:53,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:03:53,956 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 40 [2024-11-28 04:03:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:54,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:03:54,979 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-11-28 04:03:54,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-11-28 04:03:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:03:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803100787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:03:55,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:03:55,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-11-28 04:03:55,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502180763] [2024-11-28 04:03:55,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:03:55,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:03:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:03:55,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:03:55,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:03:55,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:03:55,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 344 transitions, 5228 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:55,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:03:55,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:03:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:03:59,265 INFO L124 PetriNetUnfolderBase]: 3098/4530 cut-off events. [2024-11-28 04:03:59,265 INFO L125 PetriNetUnfolderBase]: For 178438/178438 co-relation queries the response was YES. [2024-11-28 04:03:59,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43101 conditions, 4530 events. 3098/4530 cut-off events. For 178438/178438 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22158 event pairs, 466 based on Foata normal form. 2/4532 useless extension candidates. Maximal degree in co-relation 42957. Up to 1981 conditions per place. [2024-11-28 04:03:59,310 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 261 selfloop transitions, 164 changer transitions 12/438 dead transitions. [2024-11-28 04:03:59,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 438 transitions, 7126 flow [2024-11-28 04:03:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:03:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 04:03:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 247 transitions. [2024-11-28 04:03:59,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3794162826420891 [2024-11-28 04:03:59,313 INFO L175 Difference]: Start difference. First operand has 211 places, 344 transitions, 5228 flow. Second operand 21 states and 247 transitions. [2024-11-28 04:03:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 438 transitions, 7126 flow [2024-11-28 04:03:59,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 438 transitions, 6890 flow, removed 32 selfloop flow, removed 12 redundant places. [2024-11-28 04:03:59,847 INFO L231 Difference]: Finished difference. Result has 222 places, 348 transitions, 5446 flow [2024-11-28 04:03:59,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5446, PETRI_PLACES=222, PETRI_TRANSITIONS=348} [2024-11-28 04:03:59,849 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 191 predicate places. [2024-11-28 04:03:59,849 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 348 transitions, 5446 flow [2024-11-28 04:03:59,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:03:59,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:03:59,849 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:59,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:04:00,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:00,050 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:04:00,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash 542736081, now seen corresponding path program 9 times [2024-11-28 04:04:00,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682967384] [2024-11-28 04:04:00,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:04:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:00,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:04:00,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:01,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:01,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682967384] [2024-11-28 04:04:01,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682967384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:01,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216224932] [2024-11-28 04:04:01,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:04:01,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:01,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:01,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:04:02,203 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:04:02,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:02,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:04:02,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:02,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:02,990 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 40 [2024-11-28 04:04:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:03,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:04,215 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-28 04:04:04,215 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 54 treesize of output 210 [2024-11-28 04:04:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:13,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216224932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:13,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:04:13,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2024-11-28 04:04:13,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997299190] [2024-11-28 04:04:13,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:13,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:04:13,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:04:13,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:04:13,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:04:13,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:04:13,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 348 transitions, 5446 flow. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:13,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:13,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:04:13,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:17,682 INFO L124 PetriNetUnfolderBase]: 3551/5203 cut-off events. [2024-11-28 04:04:17,683 INFO L125 PetriNetUnfolderBase]: For 213419/213419 co-relation queries the response was YES. [2024-11-28 04:04:17,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50618 conditions, 5203 events. 3551/5203 cut-off events. For 213419/213419 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 26381 event pairs, 618 based on Foata normal form. 3/5206 useless extension candidates. Maximal degree in co-relation 50471. Up to 3874 conditions per place. [2024-11-28 04:04:17,728 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 331 selfloop transitions, 169 changer transitions 5/506 dead transitions. [2024-11-28 04:04:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 506 transitions, 8848 flow [2024-11-28 04:04:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:04:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 04:04:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 275 transitions. [2024-11-28 04:04:17,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-11-28 04:04:17,730 INFO L175 Difference]: Start difference. First operand has 222 places, 348 transitions, 5446 flow. Second operand 25 states and 275 transitions. [2024-11-28 04:04:17,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 506 transitions, 8848 flow [2024-11-28 04:04:18,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 506 transitions, 8510 flow, removed 29 selfloop flow, removed 16 redundant places. [2024-11-28 04:04:18,477 INFO L231 Difference]: Finished difference. Result has 238 places, 413 transitions, 6743 flow [2024-11-28 04:04:18,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5172, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6743, PETRI_PLACES=238, PETRI_TRANSITIONS=413} [2024-11-28 04:04:18,482 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-11-28 04:04:18,482 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 413 transitions, 6743 flow [2024-11-28 04:04:18,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:18,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:18,483 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:18,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:04:18,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:18,683 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:04:18,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash 994787323, now seen corresponding path program 10 times [2024-11-28 04:04:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895821900] [2024-11-28 04:04:18,685 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:04:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:18,741 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:04:18,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:20,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895821900] [2024-11-28 04:04:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895821900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631840751] [2024-11-28 04:04:20,441 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:04:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:20,444 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:20,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:04:20,761 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:04:20,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:20,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:04:20,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:21,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:21,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-28 04:04:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:21,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:22,607 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-28 04:04:22,607 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 54 treesize of output 210 [2024-11-28 04:04:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631840751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:04:31,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:04:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 26 [2024-11-28 04:04:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652473376] [2024-11-28 04:04:31,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:04:31,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:04:31,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:04:31,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:04:31,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:04:31,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:04:31,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 413 transitions, 6743 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:31,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:04:31,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:04:31,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:04:35,522 INFO L124 PetriNetUnfolderBase]: 4124/6038 cut-off events. [2024-11-28 04:04:35,522 INFO L125 PetriNetUnfolderBase]: For 262900/262900 co-relation queries the response was YES. [2024-11-28 04:04:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60905 conditions, 6038 events. 4124/6038 cut-off events. For 262900/262900 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31423 event pairs, 742 based on Foata normal form. 1/6039 useless extension candidates. Maximal degree in co-relation 60750. Up to 4411 conditions per place. [2024-11-28 04:04:35,574 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 348 selfloop transitions, 178 changer transitions 2/529 dead transitions. [2024-11-28 04:04:35,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 529 transitions, 9630 flow [2024-11-28 04:04:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:04:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:04:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 195 transitions. [2024-11-28 04:04:35,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3700189753320683 [2024-11-28 04:04:35,576 INFO L175 Difference]: Start difference. First operand has 238 places, 413 transitions, 6743 flow. Second operand 17 states and 195 transitions. [2024-11-28 04:04:35,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 529 transitions, 9630 flow [2024-11-28 04:04:36,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 529 transitions, 9449 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-11-28 04:04:36,458 INFO L231 Difference]: Finished difference. Result has 252 places, 451 transitions, 7753 flow [2024-11-28 04:04:36,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7753, PETRI_PLACES=252, PETRI_TRANSITIONS=451} [2024-11-28 04:04:36,459 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2024-11-28 04:04:36,459 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 451 transitions, 7753 flow [2024-11-28 04:04:36,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:04:36,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:04:36,460 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:04:36,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:04:36,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 04:04:36,660 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:04:36,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:04:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -482455805, now seen corresponding path program 11 times [2024-11-28 04:04:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:04:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612362635] [2024-11-28 04:04:36,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:04:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:04:36,741 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:04:36,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:04:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:04:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612362635] [2024-11-28 04:04:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612362635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:04:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443481985] [2024-11-28 04:04:40,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:04:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:04:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:04:40,341 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:04:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:04:41,043 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:04:41,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:04:41,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:04:41,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:04:41,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:04:41,756 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 48 [2024-11-28 04:04:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:04:41,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:04:43,256 INFO L349 Elim1Store]: treesize reduction 15, result has 94.6 percent of original size [2024-11-28 04:04:43,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 289 [2024-11-28 04:05:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:05:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443481985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:05:57,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:05:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 9] total 39 [2024-11-28 04:05:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857327649] [2024-11-28 04:05:57,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:05:57,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 04:05:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:05:57,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 04:05:57,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:05:57,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:05:57,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 451 transitions, 7753 flow. Second operand has 39 states, 39 states have (on average 6.0) internal successors, (234), 39 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:05:57,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:05:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:05:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:06:03,090 INFO L124 PetriNetUnfolderBase]: 4846/7095 cut-off events. [2024-11-28 04:06:03,091 INFO L125 PetriNetUnfolderBase]: For 328544/328544 co-relation queries the response was YES. [2024-11-28 04:06:03,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73254 conditions, 7095 events. 4846/7095 cut-off events. For 328544/328544 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37853 event pairs, 831 based on Foata normal form. 1/7096 useless extension candidates. Maximal degree in co-relation 72980. Up to 4764 conditions per place. [2024-11-28 04:06:03,153 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 346 selfloop transitions, 258 changer transitions 24/629 dead transitions. [2024-11-28 04:06:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 629 transitions, 11522 flow [2024-11-28 04:06:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:06:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 04:06:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 299 transitions. [2024-11-28 04:06:03,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3444700460829493 [2024-11-28 04:06:03,155 INFO L175 Difference]: Start difference. First operand has 252 places, 451 transitions, 7753 flow. Second operand 28 states and 299 transitions. [2024-11-28 04:06:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 629 transitions, 11522 flow [2024-11-28 04:06:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 629 transitions, 11329 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-11-28 04:06:04,237 INFO L231 Difference]: Finished difference. Result has 277 places, 504 transitions, 9066 flow [2024-11-28 04:06:04,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9066, PETRI_PLACES=277, PETRI_TRANSITIONS=504} [2024-11-28 04:06:04,238 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 246 predicate places. [2024-11-28 04:06:04,238 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 504 transitions, 9066 flow [2024-11-28 04:06:04,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.0) internal successors, (234), 39 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:06:04,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:06:04,239 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:06:04,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:06:04,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:04,439 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:06:04,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:06:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash -120720611, now seen corresponding path program 12 times [2024-11-28 04:06:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:06:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356034283] [2024-11-28 04:06:04,440 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:06:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:06:04,491 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:06:04,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:06,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:06:06,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356034283] [2024-11-28 04:06:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356034283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:06:06,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40248849] [2024-11-28 04:06:06,116 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:06:06,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:06,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:06:06,119 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:06:06,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:06:06,601 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:06:06,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:06,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:06:06,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:06:07,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:07,139 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 40 [2024-11-28 04:06:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:07,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:06:08,385 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-28 04:06:08,386 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 54 treesize of output 210 [2024-11-28 04:06:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40248849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:06:24,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:06:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-11-28 04:06:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433749694] [2024-11-28 04:06:24,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:06:24,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:06:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:06:24,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:06:24,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:06:24,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:06:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 504 transitions, 9066 flow. Second operand has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:06:24,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:06:24,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:06:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:06:30,584 INFO L124 PetriNetUnfolderBase]: 4865/7122 cut-off events. [2024-11-28 04:06:30,584 INFO L125 PetriNetUnfolderBase]: For 400577/400577 co-relation queries the response was YES. [2024-11-28 04:06:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78562 conditions, 7122 events. 4865/7122 cut-off events. For 400577/400577 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 38121 event pairs, 956 based on Foata normal form. 2/7124 useless extension candidates. Maximal degree in co-relation 78243. Up to 5757 conditions per place. [2024-11-28 04:06:30,695 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 409 selfloop transitions, 215 changer transitions 6/631 dead transitions. [2024-11-28 04:06:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 631 transitions, 12359 flow [2024-11-28 04:06:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:06:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 04:06:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 264 transitions. [2024-11-28 04:06:30,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3406451612903226 [2024-11-28 04:06:30,697 INFO L175 Difference]: Start difference. First operand has 277 places, 504 transitions, 9066 flow. Second operand 25 states and 264 transitions. [2024-11-28 04:06:30,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 631 transitions, 12359 flow [2024-11-28 04:06:32,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 631 transitions, 11627 flow, removed 153 selfloop flow, removed 23 redundant places. [2024-11-28 04:06:32,265 INFO L231 Difference]: Finished difference. Result has 289 places, 545 transitions, 9905 flow [2024-11-28 04:06:32,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9905, PETRI_PLACES=289, PETRI_TRANSITIONS=545} [2024-11-28 04:06:32,266 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-11-28 04:06:32,266 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 545 transitions, 9905 flow [2024-11-28 04:06:32,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:06:32,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:06:32,267 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:06:32,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:06:32,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:32,467 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:06:32,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:06:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1221836641, now seen corresponding path program 13 times [2024-11-28 04:06:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:06:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352986112] [2024-11-28 04:06:32,468 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:06:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:06:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:06:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:33,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:06:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352986112] [2024-11-28 04:06:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352986112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:06:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127780143] [2024-11-28 04:06:33,777 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:06:33,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:33,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:06:33,779 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:06:33,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:06:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:06:34,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:06:34,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:06:34,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:34,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-11-28 04:06:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:34,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:06:39,504 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-11-28 04:06:39,505 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 54 treesize of output 210 [2024-11-28 04:06:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127780143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:06:48,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:06:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2024-11-28 04:06:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501384071] [2024-11-28 04:06:48,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:06:48,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:06:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:06:48,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:06:48,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=694, Unknown=1, NotChecked=0, Total=812 [2024-11-28 04:06:48,499 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:06:48,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 545 transitions, 9905 flow. Second operand has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:06:48,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:06:48,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:06:48,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:06:52,927 INFO L124 PetriNetUnfolderBase]: 4936/7248 cut-off events. [2024-11-28 04:06:52,927 INFO L125 PetriNetUnfolderBase]: For 432196/432196 co-relation queries the response was YES. [2024-11-28 04:06:52,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83381 conditions, 7248 events. 4936/7248 cut-off events. For 432196/432196 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39146 event pairs, 961 based on Foata normal form. 1/7249 useless extension candidates. Maximal degree in co-relation 82929. Up to 5744 conditions per place. [2024-11-28 04:06:53,028 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 406 selfloop transitions, 236 changer transitions 1/644 dead transitions. [2024-11-28 04:06:53,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 644 transitions, 12850 flow [2024-11-28 04:06:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:06:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 04:06:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 229 transitions. [2024-11-28 04:06:53,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35176651305683565 [2024-11-28 04:06:53,030 INFO L175 Difference]: Start difference. First operand has 289 places, 545 transitions, 9905 flow. Second operand 21 states and 229 transitions. [2024-11-28 04:06:53,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 644 transitions, 12850 flow [2024-11-28 04:06:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 644 transitions, 12085 flow, removed 256 selfloop flow, removed 12 redundant places. [2024-11-28 04:06:55,383 INFO L231 Difference]: Finished difference. Result has 298 places, 569 transitions, 10252 flow [2024-11-28 04:06:55,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=9164, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10252, PETRI_PLACES=298, PETRI_TRANSITIONS=569} [2024-11-28 04:06:55,383 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2024-11-28 04:06:55,384 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 569 transitions, 10252 flow [2024-11-28 04:06:55,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.172413793103448) internal successors, (179), 29 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:06:55,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:06:55,384 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:06:55,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:06:55,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 04:06:55,585 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:06:55,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:06:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash -351057947, now seen corresponding path program 14 times [2024-11-28 04:06:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:06:55,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857843802] [2024-11-28 04:06:55,586 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:06:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:06:55,671 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:06:55,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:57,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:06:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857843802] [2024-11-28 04:06:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857843802] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:06:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929816543] [2024-11-28 04:06:57,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:06:57,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:06:57,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:06:57,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:06:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:06:57,427 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:06:57,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:06:57,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:06:57,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:06:57,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:06:57,870 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 40 [2024-11-28 04:06:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:06:58,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:06:59,099 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-11-28 04:06:59,099 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 64 treesize of output 236 [2024-11-28 04:07:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:07:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929816543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:07:13,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:07:13,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2024-11-28 04:07:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779987936] [2024-11-28 04:07:13,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:07:13,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:07:13,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:07:13,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:07:13,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:07:13,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:07:13,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 569 transitions, 10252 flow. Second operand has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:07:13,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:07:13,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:07:13,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:07:18,085 INFO L124 PetriNetUnfolderBase]: 5400/7926 cut-off events. [2024-11-28 04:07:18,086 INFO L125 PetriNetUnfolderBase]: For 480212/480212 co-relation queries the response was YES. [2024-11-28 04:07:18,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91410 conditions, 7926 events. 5400/7926 cut-off events. For 480212/480212 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43594 event pairs, 889 based on Foata normal form. 2/7928 useless extension candidates. Maximal degree in co-relation 90944. Up to 6170 conditions per place. [2024-11-28 04:07:18,162 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 429 selfloop transitions, 251 changer transitions 3/684 dead transitions. [2024-11-28 04:07:18,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 684 transitions, 13582 flow [2024-11-28 04:07:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:07:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 04:07:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 218 transitions. [2024-11-28 04:07:18,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-11-28 04:07:18,163 INFO L175 Difference]: Start difference. First operand has 298 places, 569 transitions, 10252 flow. Second operand 20 states and 218 transitions. [2024-11-28 04:07:18,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 684 transitions, 13582 flow [2024-11-28 04:07:19,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 684 transitions, 13337 flow, removed 34 selfloop flow, removed 14 redundant places. [2024-11-28 04:07:19,776 INFO L231 Difference]: Finished difference. Result has 309 places, 616 transitions, 11653 flow [2024-11-28 04:07:19,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10016, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11653, PETRI_PLACES=309, PETRI_TRANSITIONS=616} [2024-11-28 04:07:19,777 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 278 predicate places. [2024-11-28 04:07:19,777 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 616 transitions, 11653 flow [2024-11-28 04:07:19,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:07:19,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:07:19,778 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:07:19,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:07:19,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 04:07:19,978 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:07:19,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:07:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1900527671, now seen corresponding path program 15 times [2024-11-28 04:07:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:07:19,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744248288] [2024-11-28 04:07:19,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:07:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:07:20,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:07:20,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:07:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:07:21,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:07:21,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744248288] [2024-11-28 04:07:21,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744248288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:07:21,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721958537] [2024-11-28 04:07:21,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:07:21,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:07:21,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:07:21,058 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:07:21,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:07:21,407 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:07:21,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:07:21,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:07:21,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:07:21,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:07:21,894 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 40 [2024-11-28 04:07:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:07:22,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:07:23,185 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2024-11-28 04:07:23,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2024-11-28 04:09:48,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-28 04:09:48,264 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 04:09:48,268 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 04:09:48,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:09:48,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 04:09:48,472 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_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.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.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.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) ... 77 more [2024-11-28 04:09:48,490 INFO L158 Benchmark]: Toolchain (without parser) took 448596.26ms. Allocated memory was 142.6MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 104.9MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 3.2GB. Max. memory is 16.1GB. [2024-11-28 04:09:48,495 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:09:48,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.89ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 92.3MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:09:48,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.23ms. Allocated memory is still 142.6MB. Free memory was 92.3MB in the beginning and 90.0MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:09:48,495 INFO L158 Benchmark]: Boogie Preprocessor took 61.56ms. Allocated memory is still 142.6MB. Free memory was 90.0MB in the beginning and 87.4MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:09:48,496 INFO L158 Benchmark]: RCFGBuilder took 1774.86ms. Allocated memory is still 142.6MB. Free memory was 87.0MB in the beginning and 68.1MB in the end (delta: 18.9MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2024-11-28 04:09:48,496 INFO L158 Benchmark]: TraceAbstraction took 446322.28ms. Allocated memory was 142.6MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 67.7MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 3.2GB. Max. memory is 16.1GB. [2024-11-28 04:09:48,499 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.89ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 92.3MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.23ms. Allocated memory is still 142.6MB. Free memory was 92.3MB in the beginning and 90.0MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.56ms. Allocated memory is still 142.6MB. Free memory was 90.0MB in the beginning and 87.4MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1774.86ms. Allocated memory is still 142.6MB. Free memory was 87.0MB in the beginning and 68.1MB in the end (delta: 18.9MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. * TraceAbstraction took 446322.28ms. Allocated memory was 142.6MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 67.7MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 3.2GB. 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_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:09:52,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:09:52,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 04:09:52,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:09:52,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:09:52,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:09:52,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:09:52,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:09:52,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:09:52,542 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:09:52,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:09:52,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:09:52,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:09:52,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:09:52,544 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:09:52,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:09:52,545 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:09:52,546 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:09:52,548 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:09:52,549 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:09:52,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:09:52,550 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:09:52,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:09:52,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:09:52,550 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:09:52,551 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:09:52,551 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:09:52,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:09:52,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:09:52,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:09:52,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:09:52,552 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:09:52,553 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:09:52,553 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:09:52,554 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:09:52,554 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:09:52,554 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:09:52,554 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:09:52,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:09:52,555 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_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-28 04:09:53,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:09:53,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:09:53,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:09:53,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:09:53,048 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:09:53,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-28 04:09:57,963 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/9b99061ca/e07b4eeea12b48a6a56b088bf10b0b9d/FLAG7edc6fe8a [2024-11-28 04:09:58,425 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:09:58,426 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-28 04:09:58,440 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/9b99061ca/e07b4eeea12b48a6a56b088bf10b0b9d/FLAG7edc6fe8a [2024-11-28 04:09:58,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/data/9b99061ca/e07b4eeea12b48a6a56b088bf10b0b9d [2024-11-28 04:09:58,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:09:58,592 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:09:58,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:09:58,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:09:58,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:09:58,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:09:58" (1/1) ... [2024-11-28 04:09:58,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e87f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:58, skipping insertion in model container [2024-11-28 04:09:58,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:09:58" (1/1) ... [2024-11-28 04:09:58,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:09:59,036 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_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-11-28 04:09:59,055 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:09:59,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:09:59,106 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:09:59,182 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_32af1034-60c4-4e2f-b805-4c001a244dee/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2024-11-28 04:09:59,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:09:59,249 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:09:59,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59 WrapperNode [2024-11-28 04:09:59,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:09:59,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:09:59,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:09:59,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:09:59,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,358 INFO L138 Inliner]: procedures = 27, calls = 31, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 255 [2024-11-28 04:09:59,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:09:59,360 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:09:59,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:09:59,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:09:59,377 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,440 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:09:59,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,476 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:09:59,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:09:59,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:09:59,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:09:59,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (1/1) ... [2024-11-28 04:09:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:09:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:09:59,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:09:59,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:09:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:09:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:09:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:09:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:09:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:09:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:09:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:09:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:09:59,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:09:59,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 04:09:59,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 04:09:59,626 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:09:59,797 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:09:59,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:10:00,808 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:10:00,808 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:10:01,892 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:10:01,892 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:10:01,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:10:01 BoogieIcfgContainer [2024-11-28 04:10:01,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:10:01,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:10:01,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:10:01,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:10:01,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:09:58" (1/3) ... [2024-11-28 04:10:01,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a4b651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:10:01, skipping insertion in model container [2024-11-28 04:10:01,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:09:59" (2/3) ... [2024-11-28 04:10:01,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a4b651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:10:01, skipping insertion in model container [2024-11-28 04:10:01,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:10:01" (3/3) ... [2024-11-28 04:10:01,909 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-28 04:10:01,935 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:10:01,938 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 04:10:01,938 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:10:02,120 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 04:10:02,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-28 04:10:02,281 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-28 04:10:02,286 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:10:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-28 04:10:02,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-28 04:10:02,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-28 04:10:02,320 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:10:02,350 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;@21240d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:10:02,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 04:10:02,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:10:02,396 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-28 04:10:02,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:10:02,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:02,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:02,400 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:02,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:02,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1098880655, now seen corresponding path program 1 times [2024-11-28 04:10:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317406613] [2024-11-28 04:10:02,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:02,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:02,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:10:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:02,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:10:02,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:10:02,928 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:02,929 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317406613] [2024-11-28 04:10:02,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317406613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:02,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:02,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:10:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193546266] [2024-11-28 04:10:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:02,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:10:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:03,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:10:03,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:10:03,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:03,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:03,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:03,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:03,725 INFO L124 PetriNetUnfolderBase]: 240/353 cut-off events. [2024-11-28 04:10:03,726 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-28 04:10:03,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 353 events. 240/353 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 981 event pairs, 26 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 646. Up to 221 conditions per place. [2024-11-28 04:10:03,735 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-11-28 04:10:03,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 209 flow [2024-11-28 04:10:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:10:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:10:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-28 04:10:03,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 04:10:03,759 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 4 states and 62 transitions. [2024-11-28 04:10:03,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 209 flow [2024-11-28 04:10:03,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 04:10:03,773 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 87 flow [2024-11-28 04:10:03,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-28 04:10:03,785 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-28 04:10:03,787 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 87 flow [2024-11-28 04:10:03,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:03,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:03,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:03,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:10:03,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:03,991 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:03,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1407693163, now seen corresponding path program 2 times [2024-11-28 04:10:03,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703465601] [2024-11-28 04:10:03,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:03,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:03,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:10:04,233 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:10:04,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:04,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:10:04,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:10:04,430 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:04,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703465601] [2024-11-28 04:10:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703465601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:04,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:04,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:10:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941429557] [2024-11-28 04:10:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:04,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:10:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:04,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:10:04,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:10:04,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:04,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:04,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:04,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:04,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:05,007 INFO L124 PetriNetUnfolderBase]: 368/548 cut-off events. [2024-11-28 04:10:05,008 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2024-11-28 04:10:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 548 events. 368/548 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1728 event pairs, 108 based on Foata normal form. 11/409 useless extension candidates. Maximal degree in co-relation 317. Up to 315 conditions per place. [2024-11-28 04:10:05,019 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 48 selfloop transitions, 5 changer transitions 2/56 dead transitions. [2024-11-28 04:10:05,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 265 flow [2024-11-28 04:10:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:10:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:10:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-28 04:10:05,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-11-28 04:10:05,024 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 87 flow. Second operand 4 states and 70 transitions. [2024-11-28 04:10:05,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 265 flow [2024-11-28 04:10:05,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 56 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:10:05,029 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 112 flow [2024-11-28 04:10:05,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-11-28 04:10:05,033 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-11-28 04:10:05,033 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 112 flow [2024-11-28 04:10:05,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:05,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:05,034 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:05,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:05,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:05,238 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:05,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1671814743, now seen corresponding path program 3 times [2024-11-28 04:10:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:05,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691578155] [2024-11-28 04:10:05,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:10:05,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:05,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:05,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:10:05,413 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 04:10:05,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:05,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:10:05,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:10:05,528 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:05,528 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:05,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691578155] [2024-11-28 04:10:05,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691578155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:05,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:10:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778427302] [2024-11-28 04:10:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:05,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:10:05,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:05,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:10:05,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:10:05,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:05,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:05,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:05,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:05,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:06,031 INFO L124 PetriNetUnfolderBase]: 315/467 cut-off events. [2024-11-28 04:10:06,031 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-11-28 04:10:06,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 467 events. 315/467 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1398 event pairs, 108 based on Foata normal form. 16/377 useless extension candidates. Maximal degree in co-relation 549. Up to 315 conditions per place. [2024-11-28 04:10:06,041 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 43 selfloop transitions, 6 changer transitions 2/52 dead transitions. [2024-11-28 04:10:06,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 269 flow [2024-11-28 04:10:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:10:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:10:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-28 04:10:06,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-28 04:10:06,046 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 112 flow. Second operand 4 states and 66 transitions. [2024-11-28 04:10:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 269 flow [2024-11-28 04:10:06,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 256 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-28 04:10:06,053 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 123 flow [2024-11-28 04:10:06,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-28 04:10:06,055 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-28 04:10:06,056 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 123 flow [2024-11-28 04:10:06,056 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) [2024-11-28 04:10:06,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:06,056 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] [2024-11-28 04:10:06,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:06,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:06,257 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)] === [2024-11-28 04:10:06,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1806226818, now seen corresponding path program 1 times [2024-11-28 04:10:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112132292] [2024-11-28 04:10:06,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:06,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:06,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:10:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:06,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:06,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:10:06,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:06,465 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112132292] [2024-11-28 04:10:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112132292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:06,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:10:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320301867] [2024-11-28 04:10:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:06,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:10:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:06,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:10:06,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:10:06,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:06,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:06,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:06,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:06,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:06,734 INFO L124 PetriNetUnfolderBase]: 299/441 cut-off events. [2024-11-28 04:10:06,735 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-11-28 04:10:06,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 441 events. 299/441 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1164 event pairs, 163 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 506. Up to 438 conditions per place. [2024-11-28 04:10:06,740 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-11-28 04:10:06,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 197 flow [2024-11-28 04:10:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:10:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:10:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-11-28 04:10:06,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2024-11-28 04:10:06,742 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 123 flow. Second operand 3 states and 44 transitions. [2024-11-28 04:10:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 197 flow [2024-11-28 04:10:06,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 181 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 04:10:06,746 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2024-11-28 04:10:06,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-28 04:10:06,747 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-11-28 04:10:06,747 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2024-11-28 04:10:06,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:06,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:06,748 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:06,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:06,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:06,949 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:06,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash -884107205, now seen corresponding path program 1 times [2024-11-28 04:10:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:06,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213424982] [2024-11-28 04:10:06,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:06,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:06,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:06,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:10:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:07,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:10:07,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:10:07,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:10:07,225 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213424982] [2024-11-28 04:10:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213424982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:07,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:10:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-11-28 04:10:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897689575] [2024-11-28 04:10:07,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:07,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:10:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:07,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:10:07,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:10:07,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:07,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:07,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:07,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:07,649 INFO L124 PetriNetUnfolderBase]: 299/450 cut-off events. [2024-11-28 04:10:07,649 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-11-28 04:10:07,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 450 events. 299/450 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1167 event pairs, 163 based on Foata normal form. 9/358 useless extension candidates. Maximal degree in co-relation 1162. Up to 438 conditions per place. [2024-11-28 04:10:07,653 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 15 changer transitions 0/44 dead transitions. [2024-11-28 04:10:07,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 261 flow [2024-11-28 04:10:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:10:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:10:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-11-28 04:10:07,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-11-28 04:10:07,656 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 6 states and 71 transitions. [2024-11-28 04:10:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 261 flow [2024-11-28 04:10:07,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:10:07,659 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 229 flow [2024-11-28 04:10:07,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-28 04:10:07,661 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-11-28 04:10:07,661 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 229 flow [2024-11-28 04:10:07,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:07,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:07,661 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:07,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:07,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:07,863 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:07,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -655064780, now seen corresponding path program 2 times [2024-11-28 04:10:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:07,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493664009] [2024-11-28 04:10:07,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:07,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:07,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:07,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:10:08,033 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:10:08,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:08,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:08,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:08,092 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:08,092 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493664009] [2024-11-28 04:10:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493664009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:10:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469091688] [2024-11-28 04:10:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:08,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:10:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:08,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:10:08,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:10:08,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:08,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:08,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:08,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:08,408 INFO L124 PetriNetUnfolderBase]: 453/669 cut-off events. [2024-11-28 04:10:08,409 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-11-28 04:10:08,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 669 events. 453/669 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1959 event pairs, 163 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 1719. Up to 450 conditions per place. [2024-11-28 04:10:08,413 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 56 selfloop transitions, 2 changer transitions 2/61 dead transitions. [2024-11-28 04:10:08,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 419 flow [2024-11-28 04:10:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:10:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:10:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-28 04:10:08,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-28 04:10:08,416 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 229 flow. Second operand 3 states and 51 transitions. [2024-11-28 04:10:08,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 419 flow [2024-11-28 04:10:08,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 395 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-28 04:10:08,420 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 217 flow [2024-11-28 04:10:08,421 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-28 04:10:08,421 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-11-28 04:10:08,422 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 217 flow [2024-11-28 04:10:08,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:08,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:08,422 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:08,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:10:08,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:08,623 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:08,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1825379986, now seen corresponding path program 1 times [2024-11-28 04:10:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:08,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271424877] [2024-11-28 04:10:08,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:08,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:08,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:08,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:10:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:08,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:08,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:09,015 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:09,016 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271424877] [2024-11-28 04:10:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271424877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:09,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:09,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582970619] [2024-11-28 04:10:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:09,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:09,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:09,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:09,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:09,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:09,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:09,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:09,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:09,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:09,661 INFO L124 PetriNetUnfolderBase]: 790/1170 cut-off events. [2024-11-28 04:10:09,662 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2024-11-28 04:10:09,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3259 conditions, 1170 events. 790/1170 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4370 event pairs, 255 based on Foata normal form. 12/984 useless extension candidates. Maximal degree in co-relation 3176. Up to 681 conditions per place. [2024-11-28 04:10:09,674 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 68 selfloop transitions, 4 changer transitions 13/86 dead transitions. [2024-11-28 04:10:09,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 544 flow [2024-11-28 04:10:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-28 04:10:09,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-28 04:10:09,679 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 217 flow. Second operand 5 states and 80 transitions. [2024-11-28 04:10:09,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 544 flow [2024-11-28 04:10:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:10:09,688 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 240 flow [2024-11-28 04:10:09,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-28 04:10:09,689 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-11-28 04:10:09,689 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 240 flow [2024-11-28 04:10:09,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:09,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:09,689 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:09,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:10:09,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:09,890 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:09,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 231606334, now seen corresponding path program 2 times [2024-11-28 04:10:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798399709] [2024-11-28 04:10:09,892 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:09,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:09,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:09,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:10:10,142 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:10:10,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:10,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:10,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:10,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:10,288 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798399709] [2024-11-28 04:10:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798399709] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:10,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:10,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 04:10:10,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638029654] [2024-11-28 04:10:10,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:10,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:10,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:10,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:10,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:10:10,290 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:10,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:10,898 INFO L124 PetriNetUnfolderBase]: 810/1187 cut-off events. [2024-11-28 04:10:10,899 INFO L125 PetriNetUnfolderBase]: For 1756/1756 co-relation queries the response was YES. [2024-11-28 04:10:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3825 conditions, 1187 events. 810/1187 cut-off events. For 1756/1756 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4205 event pairs, 119 based on Foata normal form. 22/1076 useless extension candidates. Maximal degree in co-relation 3739. Up to 455 conditions per place. [2024-11-28 04:10:10,907 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 80 selfloop transitions, 7 changer transitions 3/91 dead transitions. [2024-11-28 04:10:10,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 635 flow [2024-11-28 04:10:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-28 04:10:10,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-28 04:10:10,910 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 240 flow. Second operand 5 states and 76 transitions. [2024-11-28 04:10:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 635 flow [2024-11-28 04:10:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 615 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-28 04:10:10,920 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 283 flow [2024-11-28 04:10:10,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-11-28 04:10:10,921 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-11-28 04:10:10,921 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 283 flow [2024-11-28 04:10:10,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:10,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:10,922 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:10,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:10:11,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:11,124 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:11,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1192646324, now seen corresponding path program 3 times [2024-11-28 04:10:11,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:11,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858098807] [2024-11-28 04:10:11,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:10:11,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:11,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:11,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:10:11,344 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:10:11,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:11,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:11,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:11,636 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:11,636 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858098807] [2024-11-28 04:10:11,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858098807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391571292] [2024-11-28 04:10:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:11,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:11,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:11,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:11,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:11,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:11,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:11,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:11,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:12,350 INFO L124 PetriNetUnfolderBase]: 908/1332 cut-off events. [2024-11-28 04:10:12,350 INFO L125 PetriNetUnfolderBase]: For 2358/2358 co-relation queries the response was YES. [2024-11-28 04:10:12,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 1332 events. 908/1332 cut-off events. For 2358/2358 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4997 event pairs, 273 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 4319. Up to 725 conditions per place. [2024-11-28 04:10:12,361 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 65 selfloop transitions, 9 changer transitions 12/87 dead transitions. [2024-11-28 04:10:12,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 613 flow [2024-11-28 04:10:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-28 04:10:12,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-28 04:10:12,363 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 283 flow. Second operand 5 states and 79 transitions. [2024-11-28 04:10:12,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 613 flow [2024-11-28 04:10:12,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 604 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:10:12,372 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 331 flow [2024-11-28 04:10:12,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-28 04:10:12,374 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-11-28 04:10:12,374 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 331 flow [2024-11-28 04:10:12,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:12,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:12,375 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:12,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:10:12,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:12,576 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:12,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1942910812, now seen corresponding path program 4 times [2024-11-28 04:10:12,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:12,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856389581] [2024-11-28 04:10:12,578 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:10:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:12,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:12,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:10:14,208 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:10:14,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:14,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:14,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:14,344 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:10:14,344 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:14,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856389581] [2024-11-28 04:10:14,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856389581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:10:14,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:10:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:10:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418806225] [2024-11-28 04:10:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:14,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:14,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:14,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:10:14,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 331 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:15,051 INFO L124 PetriNetUnfolderBase]: 852/1251 cut-off events. [2024-11-28 04:10:15,051 INFO L125 PetriNetUnfolderBase]: For 3161/3161 co-relation queries the response was YES. [2024-11-28 04:10:15,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 1251 events. 852/1251 cut-off events. For 3161/3161 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4495 event pairs, 272 based on Foata normal form. 12/1126 useless extension candidates. Maximal degree in co-relation 4489. Up to 821 conditions per place. [2024-11-28 04:10:15,061 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 67 selfloop transitions, 8 changer transitions 14/90 dead transitions. [2024-11-28 04:10:15,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 694 flow [2024-11-28 04:10:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-28 04:10:15,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-11-28 04:10:15,063 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 331 flow. Second operand 5 states and 76 transitions. [2024-11-28 04:10:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 694 flow [2024-11-28 04:10:15,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 676 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 04:10:15,076 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 392 flow [2024-11-28 04:10:15,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-11-28 04:10:15,077 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-11-28 04:10:15,079 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 392 flow [2024-11-28 04:10:15,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:15,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:15,079 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:15,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:10:15,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:15,280 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:15,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2001487684, now seen corresponding path program 5 times [2024-11-28 04:10:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004781330] [2024-11-28 04:10:15,282 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:10:15,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:15,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:15,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:10:19,263 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:10:19,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:19,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:19,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:19,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:19,608 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004781330] [2024-11-28 04:10:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004781330] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:19,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:19,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-28 04:10:19,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373157573] [2024-11-28 04:10:19,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:19,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:19,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:19,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:10:19,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:19,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:19,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:19,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:19,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:20,323 INFO L124 PetriNetUnfolderBase]: 862/1258 cut-off events. [2024-11-28 04:10:20,324 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-11-28 04:10:20,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4712 conditions, 1258 events. 862/1258 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4524 event pairs, 235 based on Foata normal form. 22/1143 useless extension candidates. Maximal degree in co-relation 4620. Up to 747 conditions per place. [2024-11-28 04:10:20,335 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 74 selfloop transitions, 13 changer transitions 1/89 dead transitions. [2024-11-28 04:10:20,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 698 flow [2024-11-28 04:10:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-28 04:10:20,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032258064516129 [2024-11-28 04:10:20,338 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 392 flow. Second operand 5 states and 78 transitions. [2024-11-28 04:10:20,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 698 flow [2024-11-28 04:10:20,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 680 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 04:10:20,350 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 412 flow [2024-11-28 04:10:20,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-11-28 04:10:20,352 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-11-28 04:10:20,352 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 412 flow [2024-11-28 04:10:20,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:20,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:20,353 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:20,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:10:20,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:20,554 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:20,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 224567106, now seen corresponding path program 6 times [2024-11-28 04:10:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:20,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391304181] [2024-11-28 04:10:20,556 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:10:20,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:20,558 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:20,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:10:20,939 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:10:20,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:20,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:10:20,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:21,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:10:21,158 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391304181] [2024-11-28 04:10:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391304181] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:10:21,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:10:21,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-28 04:10:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249100676] [2024-11-28 04:10:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:10:21,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:10:21,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:21,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:10:21,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:10:21,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:21,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:21,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:21,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:21,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:21,829 INFO L124 PetriNetUnfolderBase]: 860/1251 cut-off events. [2024-11-28 04:10:21,829 INFO L125 PetriNetUnfolderBase]: For 4165/4165 co-relation queries the response was YES. [2024-11-28 04:10:21,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4777 conditions, 1251 events. 860/1251 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4445 event pairs, 107 based on Foata normal form. 22/1136 useless extension candidates. Maximal degree in co-relation 4684. Up to 704 conditions per place. [2024-11-28 04:10:21,838 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 74 selfloop transitions, 14 changer transitions 1/90 dead transitions. [2024-11-28 04:10:21,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 738 flow [2024-11-28 04:10:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:10:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:10:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-28 04:10:21,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-11-28 04:10:21,840 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 412 flow. Second operand 5 states and 72 transitions. [2024-11-28 04:10:21,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 738 flow [2024-11-28 04:10:21,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 704 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 04:10:21,850 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 432 flow [2024-11-28 04:10:21,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-11-28 04:10:21,851 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-11-28 04:10:21,851 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 432 flow [2024-11-28 04:10:21,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:21,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:21,851 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:21,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:10:22,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:22,052 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:22,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1491301674, now seen corresponding path program 1 times [2024-11-28 04:10:22,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:22,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593398431] [2024-11-28 04:10:22,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:10:22,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:22,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:22,060 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:22,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:10:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:10:22,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:10:22,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:10:22,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:10:22,580 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:22,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593398431] [2024-11-28 04:10:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593398431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:22,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:10:22,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-28 04:10:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872015824] [2024-11-28 04:10:22,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:22,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:10:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:22,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:10:22,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:10:22,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:22,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 432 flow. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:22,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:22,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:22,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:23,443 INFO L124 PetriNetUnfolderBase]: 824/1196 cut-off events. [2024-11-28 04:10:23,443 INFO L125 PetriNetUnfolderBase]: For 3819/3819 co-relation queries the response was YES. [2024-11-28 04:10:23,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 1196 events. 824/1196 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4107 event pairs, 389 based on Foata normal form. 1/1064 useless extension candidates. Maximal degree in co-relation 4519. Up to 1181 conditions per place. [2024-11-28 04:10:23,453 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 44 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-11-28 04:10:23,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 574 flow [2024-11-28 04:10:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:10:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:10:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-28 04:10:23,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-11-28 04:10:23,456 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 432 flow. Second operand 7 states and 72 transitions. [2024-11-28 04:10:23,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 574 flow [2024-11-28 04:10:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 551 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 04:10:23,467 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 477 flow [2024-11-28 04:10:23,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-11-28 04:10:23,469 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-11-28 04:10:23,469 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 477 flow [2024-11-28 04:10:23,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:23,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:10:23,470 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:10:23,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:10:23,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:23,671 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:10:23,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:10:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash 675053849, now seen corresponding path program 2 times [2024-11-28 04:10:23,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:10:23,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740795336] [2024-11-28 04:10:23,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:10:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:10:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:10:23,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:10:23,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:10:24,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:10:24,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:10:24,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:10:24,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:10:27,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:10:27,899 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 234 treesize of output 230 [2024-11-28 04:10:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:10:32,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:10:46,536 INFO L349 Elim1Store]: treesize reduction 30, result has 88.1 percent of original size [2024-11-28 04:10:46,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 251 treesize of output 333 [2024-11-28 04:10:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:10:48,076 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:10:48,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740795336] [2024-11-28 04:10:48,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740795336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:10:48,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:10:48,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2024-11-28 04:10:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371638292] [2024-11-28 04:10:48,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:10:48,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:10:48,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:10:48,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:10:48,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:10:48,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-28 04:10:48,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 477 flow. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:10:48,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:10:48,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-28 04:10:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:10:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:10:54,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:11:50,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:11:53,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:12:10,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:13:37,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:14:19,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:14:37,719 WARN L286 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 143 DAG size of output: 190 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:15:01,949 INFO L124 PetriNetUnfolderBase]: 2318/3394 cut-off events. [2024-11-28 04:15:01,950 INFO L125 PetriNetUnfolderBase]: For 6694/6694 co-relation queries the response was YES. [2024-11-28 04:15:01,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11949 conditions, 3394 events. 2318/3394 cut-off events. For 6694/6694 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15803 event pairs, 122 based on Foata normal form. 4/2866 useless extension candidates. Maximal degree in co-relation 11823. Up to 952 conditions per place. [2024-11-28 04:15:01,980 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 251 selfloop transitions, 163 changer transitions 37/452 dead transitions. [2024-11-28 04:15:01,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 452 transitions, 3321 flow [2024-11-28 04:15:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 04:15:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-28 04:15:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 533 transitions. [2024-11-28 04:15:01,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36582017844886755 [2024-11-28 04:15:01,987 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 477 flow. Second operand 47 states and 533 transitions. [2024-11-28 04:15:01,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 452 transitions, 3321 flow [2024-11-28 04:15:02,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 452 transitions, 3285 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-28 04:15:02,019 INFO L231 Difference]: Finished difference. Result has 132 places, 233 transitions, 2185 flow [2024-11-28 04:15:02,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2185, PETRI_PLACES=132, PETRI_TRANSITIONS=233} [2024-11-28 04:15:02,020 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-11-28 04:15:02,020 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 233 transitions, 2185 flow [2024-11-28 04:15:02,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:15:02,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:15:02,020 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:15:02,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:15:02,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:02,221 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 04:15:02,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:15:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash -12097175, now seen corresponding path program 3 times [2024-11-28 04:15:02,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:15:02,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253045161] [2024-11-28 04:15:02,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:15:02,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:15:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:15:02,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:15:02,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32af1034-60c4-4e2f-b805-4c001a244dee/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:15:02,877 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:15:02,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:15:02,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:15:02,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:15:12,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:15:12,321 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 498 treesize of output 590 [2024-11-28 04:15:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:15:37,793 INFO L312 TraceCheckSpWp]: Computing backward predicates...