./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:02:46,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:02:46,223 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:02:46,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:02:46,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:02:46,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:02:46,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:02:46,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:02:46,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:02:46,266 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:02:46,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:02:46,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:02:46,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:02:46,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:02:46,267 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:02:46,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:02:46,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:02:46,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:02:46,268 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:02:46,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:02:46,269 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:02:46,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:02:46,270 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:02:46,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:02:46,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:02:46,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:02:46,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:02:46,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:02:46,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:02:46,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:02:46,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:02:46,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:02:46,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:02:46,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:02:46,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:02:46,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:02:46,273 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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/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 -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-11-28 03:02:46,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:02:46,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:02:46,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:02:46,656 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:02:46,656 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:02:46,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-28 03:02:50,387 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/data/e1acd1aa2/c209c8752c10437b8af9651a4254b8fc/FLAG61f95a368 [2024-11-28 03:02:50,750 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:02:50,751 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-28 03:02:50,769 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/data/e1acd1aa2/c209c8752c10437b8af9651a4254b8fc/FLAG61f95a368 [2024-11-28 03:02:50,796 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/data/e1acd1aa2/c209c8752c10437b8af9651a4254b8fc [2024-11-28 03:02:50,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:02:50,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:02:50,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:02:50,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:02:50,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:02:50,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:50" (1/1) ... [2024-11-28 03:02:50,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45189d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:50, skipping insertion in model container [2024-11-28 03:02:50,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:50" (1/1) ... [2024-11-28 03:02:50,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:02:51,145 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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2024-11-28 03:02:51,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:02:51,177 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:02:51,225 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_51016873-5c98-48c7-a7ec-5cc26bcac7c9/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2024-11-28 03:02:51,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:02:51,258 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:02:51,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51 WrapperNode [2024-11-28 03:02:51,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:02:51,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:02:51,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:02:51,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:02:51,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,347 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 216 [2024-11-28 03:02:51,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:02:51,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:02:51,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:02:51,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:02:51,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,363 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,401 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 03:02:51,402 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,419 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,421 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,433 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:02:51,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:02:51,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:02:51,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:02:51,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (1/1) ... [2024-11-28 03:02:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:02:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:51,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:02:51,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:02:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:02:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:02:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:02:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:02:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:02:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:02:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:02:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:02:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:02:51,537 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 03:02:51,730 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:02:51,733 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:02:52,371 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:02:52,371 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:02:52,956 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:02:52,956 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:02:52,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:52 BoogieIcfgContainer [2024-11-28 03:02:52,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:02:52,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:02:52,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:02:52,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:02:52,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:02:50" (1/3) ... [2024-11-28 03:02:52,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f29339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:52, skipping insertion in model container [2024-11-28 03:02:52,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:51" (2/3) ... [2024-11-28 03:02:52,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f29339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:52, skipping insertion in model container [2024-11-28 03:02:52,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:52" (3/3) ... [2024-11-28 03:02:52,966 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-11-28 03:02:52,977 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:02:52,979 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 03:02:52,979 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:02:53,056 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:02:53,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2024-11-28 03:02:53,167 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-28 03:02:53,170 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:02:53,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-28 03:02:53,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2024-11-28 03:02:53,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2024-11-28 03:02:53,198 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:02:53,218 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;@1759e89f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:02:53,218 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 03:02:53,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:02:53,244 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-11-28 03:02:53,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:02:53,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:53,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:53,247 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:53,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2076967095, now seen corresponding path program 1 times [2024-11-28 03:02:53,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:53,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37659684] [2024-11-28 03:02:53,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:53,639 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 03:02:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37659684] [2024-11-28 03:02:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37659684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:53,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:53,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:02:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915773273] [2024-11-28 03:02:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:53,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:02:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:53,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:02:53,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:02:53,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:53,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 03:02:53,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:53,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:53,899 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2024-11-28 03:02:53,899 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-28 03:02:53,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 387 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2024-11-28 03:02:53,909 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2024-11-28 03:02:53,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2024-11-28 03:02:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:02:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-28 03:02:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2024-11-28 03:02:53,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-28 03:02:53,928 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2024-11-28 03:02:53,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2024-11-28 03:02:53,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:02:53,940 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2024-11-28 03:02:53,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2024-11-28 03:02:53,948 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2024-11-28 03:02:53,949 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2024-11-28 03:02:53,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 03:02:53,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:53,949 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:53,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:02:53,950 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:53,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 173677665, now seen corresponding path program 1 times [2024-11-28 03:02:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535197393] [2024-11-28 03:02:53,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:54,382 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 03:02:54,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:54,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535197393] [2024-11-28 03:02:54,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535197393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:54,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:54,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:02:54,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009673481] [2024-11-28 03:02:54,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:54,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:02:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:54,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:02:54,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:02:54,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:54,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 03:02:54,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:54,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:54,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:54,547 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2024-11-28 03:02:54,547 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:02:54,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 387 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2024-11-28 03:02:54,553 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-11-28 03:02:54,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2024-11-28 03:02:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:02:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:02:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-11-28 03:02:54,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-11-28 03:02:54,555 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-11-28 03:02:54,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2024-11-28 03:02:54,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:02:54,559 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-11-28 03:02:54,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-11-28 03:02:54,561 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2024-11-28 03:02:54,561 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-11-28 03:02:54,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 03:02:54,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:54,562 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:54,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:02:54,563 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:54,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash -596514238, now seen corresponding path program 1 times [2024-11-28 03:02:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:54,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075698549] [2024-11-28 03:02:54,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:54,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075698549] [2024-11-28 03:02:54,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075698549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518705380] [2024-11-28 03:02:54,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:02:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:54,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:02:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:54,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:02:54,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:55,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518705380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:55,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-28 03:02:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087070349] [2024-11-28 03:02:55,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:55,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:02:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:55,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:02:55,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:02:55,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:55,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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 03:02:55,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:55,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:55,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:55,282 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2024-11-28 03:02:55,283 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:02:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 387 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2024-11-28 03:02:55,285 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2024-11-28 03:02:55,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2024-11-28 03:02:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:02:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:02:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2024-11-28 03:02:55,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-11-28 03:02:55,287 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2024-11-28 03:02:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2024-11-28 03:02:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:02:55,289 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2024-11-28 03:02:55,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-11-28 03:02:55,290 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-11-28 03:02:55,290 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2024-11-28 03:02:55,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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 03:02:55,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:55,290 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:55,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:55,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:55,495 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:55,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash -122703326, now seen corresponding path program 2 times [2024-11-28 03:02:55,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:55,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365044622] [2024-11-28 03:02:55,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:02:55,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:55,595 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:02:55,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:02:56,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:56,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365044622] [2024-11-28 03:02:56,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365044622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:56,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:56,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:02:56,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354571153] [2024-11-28 03:02:56,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:56,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:02:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:56,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:02:56,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:02:56,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:56,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:56,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:56,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:56,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:56,844 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2024-11-28 03:02:56,845 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 03:02:56,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1530 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2024-11-28 03:02:56,853 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2024-11-28 03:02:56,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2024-11-28 03:02:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:02:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:02:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-28 03:02:56,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-28 03:02:56,856 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2024-11-28 03:02:56,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2024-11-28 03:02:56,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-28 03:02:56,863 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2024-11-28 03:02:56,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-11-28 03:02:56,866 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2024-11-28 03:02:56,866 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2024-11-28 03:02:56,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:56,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:56,868 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:56,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:02:56,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:56,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 112279140, now seen corresponding path program 3 times [2024-11-28 03:02:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144046431] [2024-11-28 03:02:56,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:56,932 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:02:56,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:02:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144046431] [2024-11-28 03:02:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144046431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:57,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:57,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:02:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388325471] [2024-11-28 03:02:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:57,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:02:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:57,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:02:57,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:02:57,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:57,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:57,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:57,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:57,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:57,954 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2024-11-28 03:02:57,957 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-28 03:02:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2860 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2024-11-28 03:02:57,967 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2024-11-28 03:02:57,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2024-11-28 03:02:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:02:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:02:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-11-28 03:02:57,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-11-28 03:02:57,974 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2024-11-28 03:02:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2024-11-28 03:02:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-28 03:02:57,984 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2024-11-28 03:02:57,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-11-28 03:02:57,987 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-11-28 03:02:57,989 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2024-11-28 03:02:57,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:57,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:57,990 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:57,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:02:57,990 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:57,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 354839962, now seen corresponding path program 4 times [2024-11-28 03:02:57,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:57,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586633598] [2024-11-28 03:02:57,992 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:58,021 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:58,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:02:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:58,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586633598] [2024-11-28 03:02:58,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586633598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:02:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:02:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:02:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719045716] [2024-11-28 03:02:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:02:58,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:02:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:58,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:02:58,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:02:58,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:02:58,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:58,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:58,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:02:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:59,081 INFO L124 PetriNetUnfolderBase]: 419/747 cut-off events. [2024-11-28 03:02:59,081 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2024-11-28 03:02:59,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 747 events. 419/747 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3440 event pairs, 44 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1976. Up to 560 conditions per place. [2024-11-28 03:02:59,089 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 43 selfloop transitions, 11 changer transitions 3/58 dead transitions. [2024-11-28 03:02:59,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 335 flow [2024-11-28 03:02:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:02:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:02:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-11-28 03:02:59,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-11-28 03:02:59,093 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 61 transitions. [2024-11-28 03:02:59,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 335 flow [2024-11-28 03:02:59,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 325 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 03:02:59,102 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2024-11-28 03:02:59,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-11-28 03:02:59,104 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-11-28 03:02:59,105 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2024-11-28 03:02:59,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:02:59,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:59,107 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:59,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:02:59,107 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:02:59,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 142072834, now seen corresponding path program 5 times [2024-11-28 03:02:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:59,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126085823] [2024-11-28 03:02:59,109 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:59,149 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:02:59,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126085823] [2024-11-28 03:02:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126085823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929040582] [2024-11-28 03:02:59,829 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:59,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:59,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:02:59,996 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:02:59,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:59,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:03:00,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:00,523 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:03:00,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929040582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:00,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:03:00,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2024-11-28 03:03:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799167388] [2024-11-28 03:03:00,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:00,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:03:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:00,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:03:00,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:03:00,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:00,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:03:00,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:00,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:00,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:01,061 INFO L124 PetriNetUnfolderBase]: 419/745 cut-off events. [2024-11-28 03:03:01,061 INFO L125 PetriNetUnfolderBase]: For 1009/1009 co-relation queries the response was YES. [2024-11-28 03:03:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 745 events. 419/745 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3215 event pairs, 173 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 2198. Up to 393 conditions per place. [2024-11-28 03:03:01,069 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 51 selfloop transitions, 10 changer transitions 4/66 dead transitions. [2024-11-28 03:03:01,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 447 flow [2024-11-28 03:03:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-28 03:03:01,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-11-28 03:03:01,072 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 5 states and 66 transitions. [2024-11-28 03:03:01,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 447 flow [2024-11-28 03:03:01,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 443 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:03:01,085 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 286 flow [2024-11-28 03:03:01,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-28 03:03:01,089 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2024-11-28 03:03:01,089 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 286 flow [2024-11-28 03:03:01,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 03:03:01,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:01,090 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:01,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:01,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:03:01,294 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:01,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash -918893663, now seen corresponding path program 1 times [2024-11-28 03:03:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:01,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700869759] [2024-11-28 03:03:01,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:01,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700869759] [2024-11-28 03:03:01,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700869759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:01,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274505367] [2024-11-28 03:03:01,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:01,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:01,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:03:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:01,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:03:01,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:01,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274505367] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:01,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-28 03:03:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512944438] [2024-11-28 03:03:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:01,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:01,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:01,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:03:01,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:01,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:01,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:01,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:02,253 INFO L124 PetriNetUnfolderBase]: 445/788 cut-off events. [2024-11-28 03:03:02,254 INFO L125 PetriNetUnfolderBase]: For 1556/1556 co-relation queries the response was YES. [2024-11-28 03:03:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 788 events. 445/788 cut-off events. For 1556/1556 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3588 event pairs, 80 based on Foata normal form. 18/806 useless extension candidates. Maximal degree in co-relation 2475. Up to 362 conditions per place. [2024-11-28 03:03:02,265 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 59 selfloop transitions, 11 changer transitions 2/73 dead transitions. [2024-11-28 03:03:02,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 538 flow [2024-11-28 03:03:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-11-28 03:03:02,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-11-28 03:03:02,267 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 286 flow. Second operand 5 states and 68 transitions. [2024-11-28 03:03:02,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 538 flow [2024-11-28 03:03:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 534 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-28 03:03:02,278 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 319 flow [2024-11-28 03:03:02,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-11-28 03:03:02,281 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-11-28 03:03:02,283 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 319 flow [2024-11-28 03:03:02,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:02,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:02,284 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:02,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:03:02,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:03:02,489 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:02,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1095638529, now seen corresponding path program 1 times [2024-11-28 03:03:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395001734] [2024-11-28 03:03:02,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:02,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395001734] [2024-11-28 03:03:02,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395001734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118504506] [2024-11-28 03:03:02,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:02,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:02,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:03:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:02,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:03:02,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:02,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118504506] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:03,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:03,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-28 03:03:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949244300] [2024-11-28 03:03:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:03,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:03,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:03,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:03:03,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:03,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:03,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:03,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:03,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:03,395 INFO L124 PetriNetUnfolderBase]: 481/848 cut-off events. [2024-11-28 03:03:03,395 INFO L125 PetriNetUnfolderBase]: For 2036/2036 co-relation queries the response was YES. [2024-11-28 03:03:03,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 848 events. 481/848 cut-off events. For 2036/2036 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3797 event pairs, 92 based on Foata normal form. 8/856 useless extension candidates. Maximal degree in co-relation 2760. Up to 383 conditions per place. [2024-11-28 03:03:03,406 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 10 changer transitions 1/69 dead transitions. [2024-11-28 03:03:03,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 559 flow [2024-11-28 03:03:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-28 03:03:03,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-11-28 03:03:03,408 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 319 flow. Second operand 5 states and 64 transitions. [2024-11-28 03:03:03,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 559 flow [2024-11-28 03:03:03,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 534 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:03:03,421 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 353 flow [2024-11-28 03:03:03,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-11-28 03:03:03,422 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2024-11-28 03:03:03,424 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 353 flow [2024-11-28 03:03:03,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:03,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:03,425 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:03,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:03:03,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:03,628 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:03,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1742741603, now seen corresponding path program 2 times [2024-11-28 03:03:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:03,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552384479] [2024-11-28 03:03:03,629 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:03,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:03,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552384479] [2024-11-28 03:03:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552384479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:03,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:03,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:03:03,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709665716] [2024-11-28 03:03:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:03,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:03,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:03,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:03:03,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:03,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:03,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:03,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:03,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:04,248 INFO L124 PetriNetUnfolderBase]: 470/822 cut-off events. [2024-11-28 03:03:04,249 INFO L125 PetriNetUnfolderBase]: For 2495/2495 co-relation queries the response was YES. [2024-11-28 03:03:04,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 822 events. 470/822 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3707 event pairs, 210 based on Foata normal form. 3/825 useless extension candidates. Maximal degree in co-relation 2777. Up to 431 conditions per place. [2024-11-28 03:03:04,257 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 11 changer transitions 10/74 dead transitions. [2024-11-28 03:03:04,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 621 flow [2024-11-28 03:03:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-28 03:03:04,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:03:04,259 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 353 flow. Second operand 5 states and 65 transitions. [2024-11-28 03:03:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 621 flow [2024-11-28 03:03:04,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 601 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:03:04,274 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 384 flow [2024-11-28 03:03:04,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2024-11-28 03:03:04,277 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2024-11-28 03:03:04,277 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 384 flow [2024-11-28 03:03:04,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:04,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:04,277 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:04,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:03:04,277 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:04,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1146779599, now seen corresponding path program 2 times [2024-11-28 03:03:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950806341] [2024-11-28 03:03:04,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:04,307 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:03:04,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:04,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:04,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950806341] [2024-11-28 03:03:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950806341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:04,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:03:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699933033] [2024-11-28 03:03:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:04,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:04,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:04,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:03:04,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:04,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:04,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:04,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:04,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:04,873 INFO L124 PetriNetUnfolderBase]: 505/883 cut-off events. [2024-11-28 03:03:04,873 INFO L125 PetriNetUnfolderBase]: For 2830/2830 co-relation queries the response was YES. [2024-11-28 03:03:04,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 883 events. 505/883 cut-off events. For 2830/2830 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3993 event pairs, 213 based on Foata normal form. 9/892 useless extension candidates. Maximal degree in co-relation 3112. Up to 432 conditions per place. [2024-11-28 03:03:04,882 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 58 selfloop transitions, 13 changer transitions 2/74 dead transitions. [2024-11-28 03:03:04,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 626 flow [2024-11-28 03:03:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-28 03:03:04,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-28 03:03:04,884 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 384 flow. Second operand 5 states and 70 transitions. [2024-11-28 03:03:04,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 626 flow [2024-11-28 03:03:04,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 602 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 03:03:04,895 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 412 flow [2024-11-28 03:03:04,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2024-11-28 03:03:04,896 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-11-28 03:03:04,896 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 412 flow [2024-11-28 03:03:04,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:04,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:04,897 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:04,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:03:04,897 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:04,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1073144513, now seen corresponding path program 3 times [2024-11-28 03:03:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:04,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320586505] [2024-11-28 03:03:04,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:04,951 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:04,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:05,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:05,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320586505] [2024-11-28 03:03:05,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320586505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:05,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:05,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:03:05,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355213960] [2024-11-28 03:03:05,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:05,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:05,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:05,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:05,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:03:05,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:05,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:05,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:05,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:05,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:05,486 INFO L124 PetriNetUnfolderBase]: 499/865 cut-off events. [2024-11-28 03:03:05,487 INFO L125 PetriNetUnfolderBase]: For 2973/2973 co-relation queries the response was YES. [2024-11-28 03:03:05,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 865 events. 499/865 cut-off events. For 2973/2973 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3891 event pairs, 239 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 3078. Up to 495 conditions per place. [2024-11-28 03:03:05,497 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 48 selfloop transitions, 11 changer transitions 6/66 dead transitions. [2024-11-28 03:03:05,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 577 flow [2024-11-28 03:03:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-28 03:03:05,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-11-28 03:03:05,498 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 412 flow. Second operand 5 states and 62 transitions. [2024-11-28 03:03:05,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 577 flow [2024-11-28 03:03:05,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 564 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 03:03:05,512 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 396 flow [2024-11-28 03:03:05,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-11-28 03:03:05,513 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2024-11-28 03:03:05,513 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 396 flow [2024-11-28 03:03:05,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:05,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:05,514 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:05,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:03:05,515 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:05,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -83887761, now seen corresponding path program 3 times [2024-11-28 03:03:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:05,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451019226] [2024-11-28 03:03:05,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:05,564 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:05,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451019226] [2024-11-28 03:03:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451019226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:05,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:05,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:03:05,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132269582] [2024-11-28 03:03:05,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:05,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:05,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:05,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:05,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:03:05,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:05,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 396 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:05,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:05,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:05,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:06,076 INFO L124 PetriNetUnfolderBase]: 489/849 cut-off events. [2024-11-28 03:03:06,076 INFO L125 PetriNetUnfolderBase]: For 3171/3171 co-relation queries the response was YES. [2024-11-28 03:03:06,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 849 events. 489/849 cut-off events. For 3171/3171 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3718 event pairs, 232 based on Foata normal form. 3/852 useless extension candidates. Maximal degree in co-relation 3013. Up to 443 conditions per place. [2024-11-28 03:03:06,084 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 47 selfloop transitions, 12 changer transitions 7/67 dead transitions. [2024-11-28 03:03:06,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 606 flow [2024-11-28 03:03:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-28 03:03:06,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-11-28 03:03:06,086 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 396 flow. Second operand 5 states and 64 transitions. [2024-11-28 03:03:06,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 606 flow [2024-11-28 03:03:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 582 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:03:06,097 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2024-11-28 03:03:06,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-11-28 03:03:06,099 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2024-11-28 03:03:06,099 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2024-11-28 03:03:06,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:06,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:06,100 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:06,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:03:06,100 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:06,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1548589053, now seen corresponding path program 4 times [2024-11-28 03:03:06,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:06,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724552] [2024-11-28 03:03:06,105 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:06,129 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:06,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724552] [2024-11-28 03:03:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:03:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641661818] [2024-11-28 03:03:06,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:06,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:06,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:06,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:03:06,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:06,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:06,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:06,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:06,634 INFO L124 PetriNetUnfolderBase]: 460/792 cut-off events. [2024-11-28 03:03:06,635 INFO L125 PetriNetUnfolderBase]: For 3135/3135 co-relation queries the response was YES. [2024-11-28 03:03:06,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2847 conditions, 792 events. 460/792 cut-off events. For 3135/3135 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3386 event pairs, 195 based on Foata normal form. 8/800 useless extension candidates. Maximal degree in co-relation 2822. Up to 355 conditions per place. [2024-11-28 03:03:06,642 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 51 selfloop transitions, 13 changer transitions 3/68 dead transitions. [2024-11-28 03:03:06,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 610 flow [2024-11-28 03:03:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-28 03:03:06,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:03:06,644 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 65 transitions. [2024-11-28 03:03:06,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 610 flow [2024-11-28 03:03:06,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 580 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 03:03:06,656 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2024-11-28 03:03:06,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-11-28 03:03:06,657 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2024-11-28 03:03:06,657 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2024-11-28 03:03:06,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:06,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:06,658 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:06,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 03:03:06,658 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:06,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 488769047, now seen corresponding path program 4 times [2024-11-28 03:03:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398225717] [2024-11-28 03:03:06,659 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:06,680 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:06,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398225717] [2024-11-28 03:03:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398225717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456079866] [2024-11-28 03:03:06,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:06,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:06,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:03:06,976 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:06,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:06,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:03:06,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:07,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:07,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456079866] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:07,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:03:07,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2024-11-28 03:03:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972959374] [2024-11-28 03:03:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:07,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:07,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:07,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:03:07,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:07,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:07,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:07,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:07,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:07,611 INFO L124 PetriNetUnfolderBase]: 448/775 cut-off events. [2024-11-28 03:03:07,612 INFO L125 PetriNetUnfolderBase]: For 2990/2990 co-relation queries the response was YES. [2024-11-28 03:03:07,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2750 conditions, 775 events. 448/775 cut-off events. For 2990/2990 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3313 event pairs, 191 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 2725. Up to 405 conditions per place. [2024-11-28 03:03:07,619 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 13 changer transitions 3/69 dead transitions. [2024-11-28 03:03:07,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 624 flow [2024-11-28 03:03:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-28 03:03:07,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-11-28 03:03:07,621 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 66 transitions. [2024-11-28 03:03:07,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 624 flow [2024-11-28 03:03:07,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 576 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-28 03:03:07,632 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 383 flow [2024-11-28 03:03:07,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2024-11-28 03:03:07,633 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-11-28 03:03:07,633 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 383 flow [2024-11-28 03:03:07,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:07,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:07,634 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:07,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:03:07,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:03:07,834 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:07,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -141477379, now seen corresponding path program 5 times [2024-11-28 03:03:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:07,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899032470] [2024-11-28 03:03:07,835 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:07,884 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:03:07,884 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:08,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:08,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899032470] [2024-11-28 03:03:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899032470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:08,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934746128] [2024-11-28 03:03:08,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:08,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:08,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:08,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:03:08,455 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:03:08,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:08,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:03:08,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:08,642 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:03:08,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934746128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:03:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-28 03:03:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531797200] [2024-11-28 03:03:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:08,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:03:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:08,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:03:08,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:03:08,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:08,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:08,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:08,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:08,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:08,989 INFO L124 PetriNetUnfolderBase]: 441/754 cut-off events. [2024-11-28 03:03:08,989 INFO L125 PetriNetUnfolderBase]: For 2393/2393 co-relation queries the response was YES. [2024-11-28 03:03:08,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 754 events. 441/754 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3178 event pairs, 205 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 2588. Up to 405 conditions per place. [2024-11-28 03:03:08,996 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 40 selfloop transitions, 12 changer transitions 7/60 dead transitions. [2024-11-28 03:03:08,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 532 flow [2024-11-28 03:03:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-11-28 03:03:08,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2024-11-28 03:03:08,998 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 383 flow. Second operand 5 states and 57 transitions. [2024-11-28 03:03:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 532 flow [2024-11-28 03:03:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 482 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-28 03:03:09,007 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 339 flow [2024-11-28 03:03:09,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2024-11-28 03:03:09,008 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-11-28 03:03:09,008 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 339 flow [2024-11-28 03:03:09,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 03:03:09,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:09,009 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:09,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:09,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:03:09,213 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:09,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1184865162, now seen corresponding path program 1 times [2024-11-28 03:03:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358314197] [2024-11-28 03:03:09,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:10,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358314197] [2024-11-28 03:03:10,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358314197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320617741] [2024-11-28 03:03:10,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:10,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:10,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:10,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:03:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:11,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:03:11,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:11,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2024-11-28 03:03:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:12,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:15,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:15,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 145 [2024-11-28 03:03:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320617741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:15,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:15,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-28 03:03:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882981765] [2024-11-28 03:03:15,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:15,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:03:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:15,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:03:15,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:03:15,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:15,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 339 flow. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 03:03:15,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:15,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:15,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:23,094 INFO L124 PetriNetUnfolderBase]: 1142/2012 cut-off events. [2024-11-28 03:03:23,094 INFO L125 PetriNetUnfolderBase]: For 3859/3859 co-relation queries the response was YES. [2024-11-28 03:03:23,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6284 conditions, 2012 events. 1142/2012 cut-off events. For 3859/3859 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10748 event pairs, 172 based on Foata normal form. 9/2021 useless extension candidates. Maximal degree in co-relation 6263. Up to 357 conditions per place. [2024-11-28 03:03:23,114 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 187 selfloop transitions, 58 changer transitions 35/281 dead transitions. [2024-11-28 03:03:23,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 281 transitions, 1898 flow [2024-11-28 03:03:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:03:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-28 03:03:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2024-11-28 03:03:23,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-28 03:03:23,120 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 339 flow. Second operand 33 states and 351 transitions. [2024-11-28 03:03:23,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 281 transitions, 1898 flow [2024-11-28 03:03:23,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 281 transitions, 1824 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:03:23,139 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 933 flow [2024-11-28 03:03:23,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=933, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-11-28 03:03:23,141 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2024-11-28 03:03:23,141 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 933 flow [2024-11-28 03:03:23,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 03:03:23,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:23,141 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:23,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:23,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:03:23,343 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:23,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2118989346, now seen corresponding path program 2 times [2024-11-28 03:03:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:23,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490708821] [2024-11-28 03:03:23,344 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:23,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:23,454 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:23,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490708821] [2024-11-28 03:03:24,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490708821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:24,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406352858] [2024-11-28 03:03:24,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:24,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:24,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:24,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:03:24,932 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:24,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:24,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:03:24,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:24,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:03:25,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:03:25,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:03:26,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 67 [2024-11-28 03:03:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:26,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:28,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406352858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:28,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:28,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 25 [2024-11-28 03:03:28,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001939243] [2024-11-28 03:03:28,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:28,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:03:28,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:28,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:03:28,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:03:28,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:28,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 933 flow. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 25 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:03:28,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:28,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:28,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:32,860 INFO L124 PetriNetUnfolderBase]: 1351/2418 cut-off events. [2024-11-28 03:03:32,860 INFO L125 PetriNetUnfolderBase]: For 7911/7911 co-relation queries the response was YES. [2024-11-28 03:03:32,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 2418 events. 1351/2418 cut-off events. For 7911/7911 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13545 event pairs, 133 based on Foata normal form. 3/2421 useless extension candidates. Maximal degree in co-relation 8582. Up to 674 conditions per place. [2024-11-28 03:03:32,879 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 97 selfloop transitions, 80 changer transitions 39/217 dead transitions. [2024-11-28 03:03:32,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 217 transitions, 2007 flow [2024-11-28 03:03:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:03:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:03:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 182 transitions. [2024-11-28 03:03:32,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2024-11-28 03:03:32,882 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 933 flow. Second operand 19 states and 182 transitions. [2024-11-28 03:03:32,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 217 transitions, 2007 flow [2024-11-28 03:03:32,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 217 transitions, 1700 flow, removed 137 selfloop flow, removed 9 redundant places. [2024-11-28 03:03:32,941 INFO L231 Difference]: Finished difference. Result has 111 places, 124 transitions, 1228 flow [2024-11-28 03:03:32,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1228, PETRI_PLACES=111, PETRI_TRANSITIONS=124} [2024-11-28 03:03:32,943 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2024-11-28 03:03:32,944 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 124 transitions, 1228 flow [2024-11-28 03:03:32,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 25 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:03:32,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:32,945 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:32,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:33,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:03:33,149 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:33,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 584153952, now seen corresponding path program 3 times [2024-11-28 03:03:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312073635] [2024-11-28 03:03:33,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:33,213 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:33,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312073635] [2024-11-28 03:03:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312073635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447651437] [2024-11-28 03:03:34,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:34,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:34,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:34,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:03:34,645 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:34,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:34,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:03:34,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:35,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-11-28 03:03:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:35,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:37,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:37,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 180 [2024-11-28 03:03:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:38,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447651437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:38,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:38,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-11-28 03:03:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258812479] [2024-11-28 03:03:38,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:38,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:03:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:38,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:03:38,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:03:38,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:38,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 124 transitions, 1228 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 03:03:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:43,615 INFO L124 PetriNetUnfolderBase]: 1662/3021 cut-off events. [2024-11-28 03:03:43,616 INFO L125 PetriNetUnfolderBase]: For 13439/13439 co-relation queries the response was YES. [2024-11-28 03:03:43,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 3021 events. 1662/3021 cut-off events. For 13439/13439 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18067 event pairs, 500 based on Foata normal form. 7/3028 useless extension candidates. Maximal degree in co-relation 11581. Up to 1129 conditions per place. [2024-11-28 03:03:43,642 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 174 selfloop transitions, 121 changer transitions 30/326 dead transitions. [2024-11-28 03:03:43,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 326 transitions, 3044 flow [2024-11-28 03:03:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:03:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 03:03:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 311 transitions. [2024-11-28 03:03:43,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3737980769230769 [2024-11-28 03:03:43,646 INFO L175 Difference]: Start difference. First operand has 111 places, 124 transitions, 1228 flow. Second operand 32 states and 311 transitions. [2024-11-28 03:03:43,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 326 transitions, 3044 flow [2024-11-28 03:03:43,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 326 transitions, 2857 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-28 03:03:43,809 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 2065 flow [2024-11-28 03:03:43,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2065, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2024-11-28 03:03:43,810 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 111 predicate places. [2024-11-28 03:03:43,810 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 2065 flow [2024-11-28 03:03:43,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 03:03:43,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:43,810 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:43,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:03:44,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:44,011 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:44,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1286611300, now seen corresponding path program 4 times [2024-11-28 03:03:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488658209] [2024-11-28 03:03:44,012 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:44,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:44,066 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:44,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488658209] [2024-11-28 03:03:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488658209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124666857] [2024-11-28 03:03:45,707 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:45,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:45,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:03:45,872 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:45,873 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:45,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:03:45,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:46,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2024-11-28 03:03:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:46,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:49,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:49,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 260 [2024-11-28 03:03:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124666857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:50,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-28 03:03:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826889794] [2024-11-28 03:03:50,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:50,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:03:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:50,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:03:50,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:03:50,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 2065 flow. Second operand has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 23 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:03:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:53,654 INFO L124 PetriNetUnfolderBase]: 1750/3202 cut-off events. [2024-11-28 03:03:53,654 INFO L125 PetriNetUnfolderBase]: For 13484/13484 co-relation queries the response was YES. [2024-11-28 03:03:53,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12522 conditions, 3202 events. 1750/3202 cut-off events. For 13484/13484 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19578 event pairs, 666 based on Foata normal form. 7/3209 useless extension candidates. Maximal degree in co-relation 12487. Up to 1447 conditions per place. [2024-11-28 03:03:53,672 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 172 selfloop transitions, 111 changer transitions 28/312 dead transitions. [2024-11-28 03:03:53,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 312 transitions, 3296 flow [2024-11-28 03:03:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:03:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:03:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 241 transitions. [2024-11-28 03:03:53,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38621794871794873 [2024-11-28 03:03:53,675 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 2065 flow. Second operand 24 states and 241 transitions. [2024-11-28 03:03:53,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 312 transitions, 3296 flow [2024-11-28 03:03:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 312 transitions, 2995 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-11-28 03:03:53,859 INFO L231 Difference]: Finished difference. Result has 158 places, 205 transitions, 2276 flow [2024-11-28 03:03:53,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2276, PETRI_PLACES=158, PETRI_TRANSITIONS=205} [2024-11-28 03:03:53,860 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2024-11-28 03:03:53,860 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 205 transitions, 2276 flow [2024-11-28 03:03:53,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 23 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:03:53,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:53,861 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:53,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:03:54,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:54,063 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:54,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1524872352, now seen corresponding path program 5 times [2024-11-28 03:03:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202617205] [2024-11-28 03:03:54,064 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:54,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:03:54,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:55,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:55,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202617205] [2024-11-28 03:03:55,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202617205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:55,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944017574] [2024-11-28 03:03:55,165 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:55,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:55,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:55,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:03:55,339 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:03:55,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:55,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:03:55,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:55,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-11-28 03:03:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:56,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:58,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:58,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 180 [2024-11-28 03:03:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:03:58,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944017574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:58,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:58,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 03:03:58,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222155990] [2024-11-28 03:03:58,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:58,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:03:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:58,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:03:58,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:03:58,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:03:58,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 205 transitions, 2276 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:58,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:58,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:03:58,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:03,350 INFO L124 PetriNetUnfolderBase]: 2038/3748 cut-off events. [2024-11-28 03:04:03,350 INFO L125 PetriNetUnfolderBase]: For 14402/14402 co-relation queries the response was YES. [2024-11-28 03:04:03,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14315 conditions, 3748 events. 2038/3748 cut-off events. For 14402/14402 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23944 event pairs, 851 based on Foata normal form. 9/3757 useless extension candidates. Maximal degree in co-relation 14274. Up to 1841 conditions per place. [2024-11-28 03:04:03,386 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 225 selfloop transitions, 112 changer transitions 25/363 dead transitions. [2024-11-28 03:04:03,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 363 transitions, 3989 flow [2024-11-28 03:04:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:04:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:04:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 235 transitions. [2024-11-28 03:04:03,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39297658862876256 [2024-11-28 03:04:03,389 INFO L175 Difference]: Start difference. First operand has 158 places, 205 transitions, 2276 flow. Second operand 23 states and 235 transitions. [2024-11-28 03:04:03,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 363 transitions, 3989 flow [2024-11-28 03:04:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 363 transitions, 3861 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-11-28 03:04:03,546 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 3053 flow [2024-11-28 03:04:03,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3053, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2024-11-28 03:04:03,547 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 152 predicate places. [2024-11-28 03:04:03,547 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 3053 flow [2024-11-28 03:04:03,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:03,548 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:03,548 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:03,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:03,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:04:03,748 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:03,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1985397904, now seen corresponding path program 6 times [2024-11-28 03:04:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730766444] [2024-11-28 03:04:03,749 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:03,802 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:04:03,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730766444] [2024-11-28 03:04:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730766444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032792351] [2024-11-28 03:04:05,023 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:05,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:05,026 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:05,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:04:05,171 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:04:05,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:05,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 03:04:05,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:05,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2024-11-28 03:04:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:06,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:08,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:08,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 177 [2024-11-28 03:04:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032792351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:08,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:08,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2024-11-28 03:04:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493902069] [2024-11-28 03:04:08,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:08,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:04:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:08,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:04:08,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:04:08,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:08,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 3053 flow. Second operand has 25 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 03:04:08,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:08,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:08,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:11,147 INFO L124 PetriNetUnfolderBase]: 2310/4276 cut-off events. [2024-11-28 03:04:11,147 INFO L125 PetriNetUnfolderBase]: For 21592/21592 co-relation queries the response was YES. [2024-11-28 03:04:11,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17907 conditions, 4276 events. 2310/4276 cut-off events. For 21592/21592 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 28005 event pairs, 806 based on Foata normal form. 3/4279 useless extension candidates. Maximal degree in co-relation 17859. Up to 1373 conditions per place. [2024-11-28 03:04:11,178 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 237 selfloop transitions, 117 changer transitions 13/368 dead transitions. [2024-11-28 03:04:11,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 368 transitions, 4800 flow [2024-11-28 03:04:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:04:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:04:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 148 transitions. [2024-11-28 03:04:11,184 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2024-11-28 03:04:11,184 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 3053 flow. Second operand 15 states and 148 transitions. [2024-11-28 03:04:11,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 368 transitions, 4800 flow [2024-11-28 03:04:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 368 transitions, 4673 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-11-28 03:04:11,452 INFO L231 Difference]: Finished difference. Result has 192 places, 285 transitions, 3751 flow [2024-11-28 03:04:11,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3751, PETRI_PLACES=192, PETRI_TRANSITIONS=285} [2024-11-28 03:04:11,453 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2024-11-28 03:04:11,453 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 285 transitions, 3751 flow [2024-11-28 03:04:11,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 03:04:11,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:11,454 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:11,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:04:11,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 03:04:11,654 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:11,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash 766510026, now seen corresponding path program 7 times [2024-11-28 03:04:11,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:11,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282554908] [2024-11-28 03:04:11,655 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:04:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282554908] [2024-11-28 03:04:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282554908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300259742] [2024-11-28 03:04:12,685 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:04:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:12,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:12,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:04:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:12,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 03:04:12,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:13,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2024-11-28 03:04:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:13,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:15,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:15,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 210 [2024-11-28 03:04:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300259742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:16,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-28 03:04:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040790229] [2024-11-28 03:04:16,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:16,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:04:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:16,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:04:16,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:04:16,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:16,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 285 transitions, 3751 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:04:16,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:16,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:16,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:21,244 INFO L124 PetriNetUnfolderBase]: 2557/4751 cut-off events. [2024-11-28 03:04:21,244 INFO L125 PetriNetUnfolderBase]: For 31906/31906 co-relation queries the response was YES. [2024-11-28 03:04:21,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21798 conditions, 4751 events. 2557/4751 cut-off events. For 31906/31906 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 32050 event pairs, 1111 based on Foata normal form. 10/4761 useless extension candidates. Maximal degree in co-relation 21744. Up to 2513 conditions per place. [2024-11-28 03:04:21,289 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 298 selfloop transitions, 127 changer transitions 32/458 dead transitions. [2024-11-28 03:04:21,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 458 transitions, 5949 flow [2024-11-28 03:04:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:04:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:04:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 279 transitions. [2024-11-28 03:04:21,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-11-28 03:04:21,291 INFO L175 Difference]: Start difference. First operand has 192 places, 285 transitions, 3751 flow. Second operand 27 states and 279 transitions. [2024-11-28 03:04:21,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 458 transitions, 5949 flow [2024-11-28 03:04:21,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 458 transitions, 5703 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-11-28 03:04:21,658 INFO L231 Difference]: Finished difference. Result has 228 places, 318 transitions, 4376 flow [2024-11-28 03:04:21,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4376, PETRI_PLACES=228, PETRI_TRANSITIONS=318} [2024-11-28 03:04:21,659 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2024-11-28 03:04:21,659 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 318 transitions, 4376 flow [2024-11-28 03:04:21,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:04:21,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:21,659 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:21,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:04:21,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:21,860 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:21,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1543956595, now seen corresponding path program 8 times [2024-11-28 03:04:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:21,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674766078] [2024-11-28 03:04:21,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:21,898 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:21,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:22,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:22,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674766078] [2024-11-28 03:04:22,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674766078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:22,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004502375] [2024-11-28 03:04:22,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:22,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:22,541 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:22,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:04:22,721 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:22,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:22,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:04:22,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:23,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:23,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:23,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-11-28 03:04:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004502375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:23,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:23,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-28 03:04:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917514181] [2024-11-28 03:04:23,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:23,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:04:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:23,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:04:23,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:04:23,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:23,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 318 transitions, 4376 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 03:04:23,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:23,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:23,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:25,342 INFO L124 PetriNetUnfolderBase]: 2662/4920 cut-off events. [2024-11-28 03:04:25,342 INFO L125 PetriNetUnfolderBase]: For 34412/34412 co-relation queries the response was YES. [2024-11-28 03:04:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23287 conditions, 4920 events. 2662/4920 cut-off events. For 34412/34412 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33114 event pairs, 506 based on Foata normal form. 21/4941 useless extension candidates. Maximal degree in co-relation 23220. Up to 1382 conditions per place. [2024-11-28 03:04:25,377 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 250 selfloop transitions, 143 changer transitions 7/401 dead transitions. [2024-11-28 03:04:25,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 401 transitions, 5769 flow [2024-11-28 03:04:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:04:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:04:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 156 transitions. [2024-11-28 03:04:25,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 03:04:25,378 INFO L175 Difference]: Start difference. First operand has 228 places, 318 transitions, 4376 flow. Second operand 15 states and 156 transitions. [2024-11-28 03:04:25,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 401 transitions, 5769 flow [2024-11-28 03:04:25,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 401 transitions, 5549 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-11-28 03:04:25,749 INFO L231 Difference]: Finished difference. Result has 233 places, 330 transitions, 4670 flow [2024-11-28 03:04:25,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4670, PETRI_PLACES=233, PETRI_TRANSITIONS=330} [2024-11-28 03:04:25,750 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 208 predicate places. [2024-11-28 03:04:25,750 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 330 transitions, 4670 flow [2024-11-28 03:04:25,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 03:04:25,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:25,750 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:25,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:04:25,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:25,951 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:25,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash 204550565, now seen corresponding path program 9 times [2024-11-28 03:04:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:25,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704395481] [2024-11-28 03:04:25,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:25,998 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:04:25,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:26,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704395481] [2024-11-28 03:04:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704395481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:26,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874062377] [2024-11-28 03:04:26,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:26,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:26,562 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:04:26,735 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:04:26,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:26,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:04:26,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:26,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:04:26,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:04:26,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:04:27,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-28 03:04:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:27,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:27,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874062377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:27,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:27,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 23 [2024-11-28 03:04:27,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042276684] [2024-11-28 03:04:27,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:27,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:04:27,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:27,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:04:27,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:04:27,732 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:27,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 330 transitions, 4670 flow. Second operand has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 03:04:27,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:27,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:27,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:29,923 INFO L124 PetriNetUnfolderBase]: 2664/4901 cut-off events. [2024-11-28 03:04:29,923 INFO L125 PetriNetUnfolderBase]: For 36221/36221 co-relation queries the response was YES. [2024-11-28 03:04:29,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 4901 events. 2664/4901 cut-off events. For 36221/36221 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32982 event pairs, 1273 based on Foata normal form. 24/4925 useless extension candidates. Maximal degree in co-relation 23412. Up to 2628 conditions per place. [2024-11-28 03:04:29,964 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 290 selfloop transitions, 94 changer transitions 9/394 dead transitions. [2024-11-28 03:04:29,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 394 transitions, 5830 flow [2024-11-28 03:04:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:04:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:04:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-11-28 03:04:29,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-28 03:04:29,965 INFO L175 Difference]: Start difference. First operand has 233 places, 330 transitions, 4670 flow. Second operand 14 states and 143 transitions. [2024-11-28 03:04:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 394 transitions, 5830 flow [2024-11-28 03:04:30,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 394 transitions, 5627 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-11-28 03:04:30,273 INFO L231 Difference]: Finished difference. Result has 236 places, 336 transitions, 4785 flow [2024-11-28 03:04:30,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4785, PETRI_PLACES=236, PETRI_TRANSITIONS=336} [2024-11-28 03:04:30,273 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 211 predicate places. [2024-11-28 03:04:30,274 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 336 transitions, 4785 flow [2024-11-28 03:04:30,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 03:04:30,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:30,274 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:30,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:30,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:04:30,475 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:30,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1808832671, now seen corresponding path program 10 times [2024-11-28 03:04:30,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:30,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447058127] [2024-11-28 03:04:30,475 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:30,511 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:30,511 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447058127] [2024-11-28 03:04:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447058127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150970483] [2024-11-28 03:04:31,315 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:31,318 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:04:31,492 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:31,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:31,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:04:31,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:31,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:32,172 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:04:32,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-11-28 03:04:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:32,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150970483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:32,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:32,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2024-11-28 03:04:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484181038] [2024-11-28 03:04:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:32,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:04:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:32,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:04:32,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:04:32,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:32,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 336 transitions, 4785 flow. Second operand has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 22 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 03:04:32,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:32,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:32,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:34,659 INFO L124 PetriNetUnfolderBase]: 2755/5070 cut-off events. [2024-11-28 03:04:34,660 INFO L125 PetriNetUnfolderBase]: For 42504/42504 co-relation queries the response was YES. [2024-11-28 03:04:34,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26559 conditions, 5070 events. 2755/5070 cut-off events. For 42504/42504 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34188 event pairs, 392 based on Foata normal form. 21/5091 useless extension candidates. Maximal degree in co-relation 26491. Up to 1090 conditions per place. [2024-11-28 03:04:34,702 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 241 selfloop transitions, 201 changer transitions 12/455 dead transitions. [2024-11-28 03:04:34,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 455 transitions, 6604 flow [2024-11-28 03:04:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 03:04:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 03:04:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 232 transitions. [2024-11-28 03:04:34,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3569230769230769 [2024-11-28 03:04:34,704 INFO L175 Difference]: Start difference. First operand has 236 places, 336 transitions, 4785 flow. Second operand 25 states and 232 transitions. [2024-11-28 03:04:34,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 455 transitions, 6604 flow [2024-11-28 03:04:35,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 455 transitions, 6446 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-11-28 03:04:35,192 INFO L231 Difference]: Finished difference. Result has 253 places, 355 transitions, 5394 flow [2024-11-28 03:04:35,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5394, PETRI_PLACES=253, PETRI_TRANSITIONS=355} [2024-11-28 03:04:35,193 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 228 predicate places. [2024-11-28 03:04:35,193 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 355 transitions, 5394 flow [2024-11-28 03:04:35,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 22 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 03:04:35,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:35,193 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:35,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:35,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:35,394 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:35,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:35,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1523511951, now seen corresponding path program 11 times [2024-11-28 03:04:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849490602] [2024-11-28 03:04:35,394 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:04:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:35,429 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:04:35,430 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:04:36,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:36,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849490602] [2024-11-28 03:04:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849490602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:36,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402981880] [2024-11-28 03:04:36,117 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:04:36,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:36,120 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:04:36,296 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:04:36,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:36,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:04:36,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:36,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:04:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:36,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:36,802 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:04:36,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2024-11-28 03:04:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402981880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:36,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:04:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221534998] [2024-11-28 03:04:36,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:36,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:04:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:36,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:04:36,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:04:36,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:36,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 355 transitions, 5394 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 03:04:36,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:36,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:36,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:38,437 INFO L124 PetriNetUnfolderBase]: 2758/5082 cut-off events. [2024-11-28 03:04:38,437 INFO L125 PetriNetUnfolderBase]: For 47448/47448 co-relation queries the response was YES. [2024-11-28 03:04:38,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27286 conditions, 5082 events. 2758/5082 cut-off events. For 47448/47448 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34691 event pairs, 1415 based on Foata normal form. 3/5085 useless extension candidates. Maximal degree in co-relation 27216. Up to 2803 conditions per place. [2024-11-28 03:04:38,494 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 321 selfloop transitions, 77 changer transitions 13/412 dead transitions. [2024-11-28 03:04:38,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 412 transitions, 6661 flow [2024-11-28 03:04:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:04:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:04:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-11-28 03:04:38,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-11-28 03:04:38,495 INFO L175 Difference]: Start difference. First operand has 253 places, 355 transitions, 5394 flow. Second operand 9 states and 101 transitions. [2024-11-28 03:04:38,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 412 transitions, 6661 flow [2024-11-28 03:04:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 412 transitions, 6518 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-11-28 03:04:38,916 INFO L231 Difference]: Finished difference. Result has 255 places, 354 transitions, 5408 flow [2024-11-28 03:04:38,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5408, PETRI_PLACES=255, PETRI_TRANSITIONS=354} [2024-11-28 03:04:38,917 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2024-11-28 03:04:38,917 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 354 transitions, 5408 flow [2024-11-28 03:04:38,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 03:04:38,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:38,917 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:38,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:04:39,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:04:39,118 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:39,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -705027803, now seen corresponding path program 12 times [2024-11-28 03:04:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:39,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731002485] [2024-11-28 03:04:39,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:39,168 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:04:39,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:39,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:39,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731002485] [2024-11-28 03:04:39,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731002485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:39,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503579348] [2024-11-28 03:04:39,853 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:39,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:39,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:39,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:04:40,052 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:04:40,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:40,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:04:40,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:40,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-28 03:04:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:40,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:41,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:41,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-11-28 03:04:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:41,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503579348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:41,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:41,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:04:41,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665817050] [2024-11-28 03:04:41,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:41,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:04:41,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:41,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:04:41,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:04:41,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:41,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 354 transitions, 5408 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 03:04:41,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:41,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:41,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:44,737 INFO L124 PetriNetUnfolderBase]: 2777/5101 cut-off events. [2024-11-28 03:04:44,737 INFO L125 PetriNetUnfolderBase]: For 48231/48231 co-relation queries the response was YES. [2024-11-28 03:04:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28714 conditions, 5101 events. 2777/5101 cut-off events. For 48231/48231 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34538 event pairs, 301 based on Foata normal form. 15/5116 useless extension candidates. Maximal degree in co-relation 28644. Up to 1220 conditions per place. [2024-11-28 03:04:44,782 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 271 selfloop transitions, 227 changer transitions 23/522 dead transitions. [2024-11-28 03:04:44,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 522 transitions, 7677 flow [2024-11-28 03:04:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:04:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 03:04:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 347 transitions. [2024-11-28 03:04:44,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3813186813186813 [2024-11-28 03:04:44,784 INFO L175 Difference]: Start difference. First operand has 255 places, 354 transitions, 5408 flow. Second operand 35 states and 347 transitions. [2024-11-28 03:04:44,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 522 transitions, 7677 flow [2024-11-28 03:04:45,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 522 transitions, 7501 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-11-28 03:04:45,157 INFO L231 Difference]: Finished difference. Result has 284 places, 368 transitions, 6084 flow [2024-11-28 03:04:45,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6084, PETRI_PLACES=284, PETRI_TRANSITIONS=368} [2024-11-28 03:04:45,158 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2024-11-28 03:04:45,158 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 368 transitions, 6084 flow [2024-11-28 03:04:45,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 03:04:45,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:45,159 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:45,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:04:45,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:04:45,359 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:45,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash -917593115, now seen corresponding path program 13 times [2024-11-28 03:04:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:45,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504724280] [2024-11-28 03:04:45,361 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:04:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:46,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504724280] [2024-11-28 03:04:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504724280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308352854] [2024-11-28 03:04:46,237 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:04:46,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:46,240 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:46,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:04:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:46,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:04:46,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:46,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:04:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:46,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:46,862 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:04:46,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2024-11-28 03:04:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308352854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:46,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 03:04:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018109530] [2024-11-28 03:04:46,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:46,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:04:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:46,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:04:46,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:04:46,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:46,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 368 transitions, 6084 flow. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 03:04:46,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:46,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:46,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:48,581 INFO L124 PetriNetUnfolderBase]: 2766/5075 cut-off events. [2024-11-28 03:04:48,581 INFO L125 PetriNetUnfolderBase]: For 53479/53479 co-relation queries the response was YES. [2024-11-28 03:04:48,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28850 conditions, 5075 events. 2766/5075 cut-off events. For 53479/53479 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 34433 event pairs, 1496 based on Foata normal form. 3/5078 useless extension candidates. Maximal degree in co-relation 28777. Up to 3043 conditions per place. [2024-11-28 03:04:48,632 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 294 selfloop transitions, 87 changer transitions 12/394 dead transitions. [2024-11-28 03:04:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 394 transitions, 6995 flow [2024-11-28 03:04:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:04:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:04:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-11-28 03:04:48,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-11-28 03:04:48,633 INFO L175 Difference]: Start difference. First operand has 284 places, 368 transitions, 6084 flow. Second operand 9 states and 90 transitions. [2024-11-28 03:04:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 394 transitions, 6995 flow [2024-11-28 03:04:49,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 394 transitions, 6660 flow, removed 42 selfloop flow, removed 19 redundant places. [2024-11-28 03:04:49,029 INFO L231 Difference]: Finished difference. Result has 271 places, 364 transitions, 5852 flow [2024-11-28 03:04:49,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5725, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5852, PETRI_PLACES=271, PETRI_TRANSITIONS=364} [2024-11-28 03:04:49,031 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2024-11-28 03:04:49,031 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 364 transitions, 5852 flow [2024-11-28 03:04:49,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 03:04:49,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:49,031 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:49,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:04:49,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:04:49,232 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:49,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 572601851, now seen corresponding path program 14 times [2024-11-28 03:04:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917557753] [2024-11-28 03:04:49,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:49,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:49,266 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917557753] [2024-11-28 03:04:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917557753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051398296] [2024-11-28 03:04:49,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:49,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:04:50,065 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:50,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:50,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:04:50,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:50,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:50,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:50,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-11-28 03:04:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051398296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:50,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:50,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 16 [2024-11-28 03:04:50,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776032935] [2024-11-28 03:04:50,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:50,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:04:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:50,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:04:50,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:04:50,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:50,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 364 transitions, 5852 flow. Second operand has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 03:04:50,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:50,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:50,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:52,324 INFO L124 PetriNetUnfolderBase]: 2794/5118 cut-off events. [2024-11-28 03:04:52,324 INFO L125 PetriNetUnfolderBase]: For 52958/52958 co-relation queries the response was YES. [2024-11-28 03:04:52,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28654 conditions, 5118 events. 2794/5118 cut-off events. For 52958/52958 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34841 event pairs, 1853 based on Foata normal form. 21/5139 useless extension candidates. Maximal degree in co-relation 28581. Up to 4380 conditions per place. [2024-11-28 03:04:52,382 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 343 selfloop transitions, 47 changer transitions 4/395 dead transitions. [2024-11-28 03:04:52,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 395 transitions, 6860 flow [2024-11-28 03:04:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:04:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:04:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-11-28 03:04:52,383 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-28 03:04:52,383 INFO L175 Difference]: Start difference. First operand has 271 places, 364 transitions, 5852 flow. Second operand 9 states and 91 transitions. [2024-11-28 03:04:52,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 395 transitions, 6860 flow [2024-11-28 03:04:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 395 transitions, 6702 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:04:52,793 INFO L231 Difference]: Finished difference. Result has 270 places, 365 transitions, 5826 flow [2024-11-28 03:04:52,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5826, PETRI_PLACES=270, PETRI_TRANSITIONS=365} [2024-11-28 03:04:52,794 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 245 predicate places. [2024-11-28 03:04:52,794 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 365 transitions, 5826 flow [2024-11-28 03:04:52,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 03:04:52,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:52,795 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:52,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:52,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:52,995 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:52,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash 37729365, now seen corresponding path program 15 times [2024-11-28 03:04:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664636926] [2024-11-28 03:04:52,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:53,023 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:53,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:53,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:53,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664636926] [2024-11-28 03:04:53,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664636926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:04:53,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:04:53,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:04:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291579924] [2024-11-28 03:04:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:04:53,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:04:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:53,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:04:53,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:04:53,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:53,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 365 transitions, 5826 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 03:04:53,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:53,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:53,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:55,484 INFO L124 PetriNetUnfolderBase]: 3112/5670 cut-off events. [2024-11-28 03:04:55,485 INFO L125 PetriNetUnfolderBase]: For 58188/58188 co-relation queries the response was YES. [2024-11-28 03:04:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31824 conditions, 5670 events. 3112/5670 cut-off events. For 58188/58188 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39393 event pairs, 1938 based on Foata normal form. 15/5685 useless extension candidates. Maximal degree in co-relation 31750. Up to 4596 conditions per place. [2024-11-28 03:04:55,580 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 358 selfloop transitions, 64 changer transitions 4/427 dead transitions. [2024-11-28 03:04:55,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 427 transitions, 7455 flow [2024-11-28 03:04:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:04:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:04:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-11-28 03:04:55,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-28 03:04:55,582 INFO L175 Difference]: Start difference. First operand has 270 places, 365 transitions, 5826 flow. Second operand 9 states and 91 transitions. [2024-11-28 03:04:55,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 427 transitions, 7455 flow [2024-11-28 03:04:56,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 427 transitions, 7326 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-28 03:04:56,033 INFO L231 Difference]: Finished difference. Result has 274 places, 389 transitions, 6362 flow [2024-11-28 03:04:56,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6362, PETRI_PLACES=274, PETRI_TRANSITIONS=389} [2024-11-28 03:04:56,034 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 249 predicate places. [2024-11-28 03:04:56,034 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 389 transitions, 6362 flow [2024-11-28 03:04:56,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 03:04:56,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:56,035 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:56,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-28 03:04:56,035 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:56,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash -768509919, now seen corresponding path program 16 times [2024-11-28 03:04:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299814105] [2024-11-28 03:04:56,035 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:56,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:56,072 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:56,072 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:57,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:57,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299814105] [2024-11-28 03:04:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299814105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985846384] [2024-11-28 03:04:57,004 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:57,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:57,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:04:57,193 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:57,193 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:57,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:04:57,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:57,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-28 03:04:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:57,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:58,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:58,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2024-11-28 03:04:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:04:58,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985846384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:58,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:58,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-28 03:04:58,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565999948] [2024-11-28 03:04:58,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:58,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:04:58,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:58,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:04:58,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:04:58,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:04:58,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 389 transitions, 6362 flow. Second operand has 22 states, 22 states have (on average 5.863636363636363) internal successors, (129), 22 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 03:04:58,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:58,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:04:58,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:01,106 INFO L124 PetriNetUnfolderBase]: 3366/6102 cut-off events. [2024-11-28 03:05:01,106 INFO L125 PetriNetUnfolderBase]: For 70854/70854 co-relation queries the response was YES. [2024-11-28 03:05:01,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35997 conditions, 6102 events. 3366/6102 cut-off events. For 70854/70854 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42711 event pairs, 1543 based on Foata normal form. 58/6160 useless extension candidates. Maximal degree in co-relation 35920. Up to 4035 conditions per place. [2024-11-28 03:05:01,165 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 311 selfloop transitions, 169 changer transitions 13/494 dead transitions. [2024-11-28 03:05:01,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 494 transitions, 8415 flow [2024-11-28 03:05:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:05:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:05:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 187 transitions. [2024-11-28 03:05:01,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3995726495726496 [2024-11-28 03:05:01,166 INFO L175 Difference]: Start difference. First operand has 274 places, 389 transitions, 6362 flow. Second operand 18 states and 187 transitions. [2024-11-28 03:05:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 494 transitions, 8415 flow [2024-11-28 03:05:01,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 494 transitions, 8333 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-28 03:05:01,641 INFO L231 Difference]: Finished difference. Result has 290 places, 412 transitions, 7227 flow [2024-11-28 03:05:01,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6223, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7227, PETRI_PLACES=290, PETRI_TRANSITIONS=412} [2024-11-28 03:05:01,642 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 265 predicate places. [2024-11-28 03:05:01,642 INFO L471 AbstractCegarLoop]: Abstraction has has 290 places, 412 transitions, 7227 flow [2024-11-28 03:05:01,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.863636363636363) internal successors, (129), 22 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 03:05:01,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:01,642 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:01,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:01,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:01,843 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:01,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1499208537, now seen corresponding path program 17 times [2024-11-28 03:05:01,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:01,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089530977] [2024-11-28 03:05:01,844 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:01,879 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:01,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:02,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089530977] [2024-11-28 03:05:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089530977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:02,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263242240] [2024-11-28 03:05:02,965 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:02,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:02,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:02,967 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:02,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:05:03,130 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:03,130 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:03,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:05:03,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:03,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-28 03:05:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:03,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:03,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:03,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2024-11-28 03:05:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263242240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:03,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:03,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-28 03:05:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442444887] [2024-11-28 03:05:03,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:03,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:05:03,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:03,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:05:03,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:05:03,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:03,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 412 transitions, 7227 flow. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 03:05:03,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:03,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:03,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:06,305 INFO L124 PetriNetUnfolderBase]: 3361/6082 cut-off events. [2024-11-28 03:05:06,305 INFO L125 PetriNetUnfolderBase]: For 75168/75168 co-relation queries the response was YES. [2024-11-28 03:05:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37044 conditions, 6082 events. 3361/6082 cut-off events. For 75168/75168 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42461 event pairs, 1931 based on Foata normal form. 26/6108 useless extension candidates. Maximal degree in co-relation 36962. Up to 4656 conditions per place. [2024-11-28 03:05:06,398 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 334 selfloop transitions, 122 changer transitions 10/467 dead transitions. [2024-11-28 03:05:06,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 467 transitions, 8439 flow [2024-11-28 03:05:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:05:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:05:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-11-28 03:05:06,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2024-11-28 03:05:06,400 INFO L175 Difference]: Start difference. First operand has 290 places, 412 transitions, 7227 flow. Second operand 15 states and 154 transitions. [2024-11-28 03:05:06,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 467 transitions, 8439 flow [2024-11-28 03:05:06,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 467 transitions, 8289 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-11-28 03:05:06,979 INFO L231 Difference]: Finished difference. Result has 301 places, 407 transitions, 7351 flow [2024-11-28 03:05:06,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7351, PETRI_PLACES=301, PETRI_TRANSITIONS=407} [2024-11-28 03:05:06,979 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 276 predicate places. [2024-11-28 03:05:06,980 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 407 transitions, 7351 flow [2024-11-28 03:05:06,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 23 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 03:05:06,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:06,980 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:06,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:05:07,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:07,181 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:07,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1547599405, now seen corresponding path program 18 times [2024-11-28 03:05:07,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:07,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822685663] [2024-11-28 03:05:07,181 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:07,217 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:05:07,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:07,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:07,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822685663] [2024-11-28 03:05:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822685663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:07,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890529755] [2024-11-28 03:05:07,876 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:07,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:07,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:07,883 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:07,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:05:08,094 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:05:08,094 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:08,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:05:08,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:08,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:08,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:08,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-11-28 03:05:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:08,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890529755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:08,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:08,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-28 03:05:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209515708] [2024-11-28 03:05:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:08,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:05:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:08,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:05:08,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:05:08,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:08,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 407 transitions, 7351 flow. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:08,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:08,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:08,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:10,883 INFO L124 PetriNetUnfolderBase]: 3379/6103 cut-off events. [2024-11-28 03:05:10,883 INFO L125 PetriNetUnfolderBase]: For 77835/77835 co-relation queries the response was YES. [2024-11-28 03:05:10,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37622 conditions, 6103 events. 3379/6103 cut-off events. For 77835/77835 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42664 event pairs, 2339 based on Foata normal form. 20/6123 useless extension candidates. Maximal degree in co-relation 37538. Up to 5523 conditions per place. [2024-11-28 03:05:11,002 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 372 selfloop transitions, 52 changer transitions 2/427 dead transitions. [2024-11-28 03:05:11,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 427 transitions, 8375 flow [2024-11-28 03:05:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:05:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:05:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-11-28 03:05:11,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-11-28 03:05:11,003 INFO L175 Difference]: Start difference. First operand has 301 places, 407 transitions, 7351 flow. Second operand 9 states and 84 transitions. [2024-11-28 03:05:11,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 427 transitions, 8375 flow [2024-11-28 03:05:11,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 427 transitions, 8323 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-28 03:05:11,662 INFO L231 Difference]: Finished difference. Result has 300 places, 406 transitions, 7424 flow [2024-11-28 03:05:11,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7424, PETRI_PLACES=300, PETRI_TRANSITIONS=406} [2024-11-28 03:05:11,662 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 275 predicate places. [2024-11-28 03:05:11,663 INFO L471 AbstractCegarLoop]: Abstraction has has 300 places, 406 transitions, 7424 flow [2024-11-28 03:05:11,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:11,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:11,663 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:11,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:11,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:11,864 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:11,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2012027175, now seen corresponding path program 19 times [2024-11-28 03:05:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040910623] [2024-11-28 03:05:11,864 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:12,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040910623] [2024-11-28 03:05:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040910623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951875256] [2024-11-28 03:05:12,412 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:12,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:12,414 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:12,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:05:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:12,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:05:12,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:12,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:05:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:12,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:13,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:13,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2024-11-28 03:05:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:13,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951875256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:13,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:13,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-11-28 03:05:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916400096] [2024-11-28 03:05:13,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:13,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:05:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:13,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:05:13,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:05:13,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:13,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 406 transitions, 7424 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:05:13,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:13,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:13,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:15,642 INFO L124 PetriNetUnfolderBase]: 3349/6028 cut-off events. [2024-11-28 03:05:15,643 INFO L125 PetriNetUnfolderBase]: For 78406/78406 co-relation queries the response was YES. [2024-11-28 03:05:15,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37365 conditions, 6028 events. 3349/6028 cut-off events. For 78406/78406 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41862 event pairs, 1953 based on Foata normal form. 6/6034 useless extension candidates. Maximal degree in co-relation 37281. Up to 4494 conditions per place. [2024-11-28 03:05:15,701 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 323 selfloop transitions, 96 changer transitions 15/435 dead transitions. [2024-11-28 03:05:15,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 435 transitions, 8434 flow [2024-11-28 03:05:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:05:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 03:05:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 117 transitions. [2024-11-28 03:05:15,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-11-28 03:05:15,702 INFO L175 Difference]: Start difference. First operand has 300 places, 406 transitions, 7424 flow. Second operand 13 states and 117 transitions. [2024-11-28 03:05:15,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 435 transitions, 8434 flow [2024-11-28 03:05:16,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 435 transitions, 8242 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-11-28 03:05:16,237 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 7268 flow [2024-11-28 03:05:16,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7268, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-11-28 03:05:16,237 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 275 predicate places. [2024-11-28 03:05:16,238 INFO L471 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 7268 flow [2024-11-28 03:05:16,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:05:16,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:16,238 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:16,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:05:16,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:05:16,438 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:16,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1713458633, now seen corresponding path program 20 times [2024-11-28 03:05:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:16,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177489630] [2024-11-28 03:05:16,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:16,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:16,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:16,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177489630] [2024-11-28 03:05:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177489630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047955106] [2024-11-28 03:05:16,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:16,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:16,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:05:17,162 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:17,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:17,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:05:17,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:05:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:05:17,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:05:17,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-28 03:05:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:17,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047955106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:17,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 8] total 22 [2024-11-28 03:05:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652311878] [2024-11-28 03:05:17,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:17,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:05:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:17,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:05:17,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:05:17,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:17,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 7268 flow. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:17,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:17,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:20,063 INFO L124 PetriNetUnfolderBase]: 3354/5997 cut-off events. [2024-11-28 03:05:20,063 INFO L125 PetriNetUnfolderBase]: For 76983/76983 co-relation queries the response was YES. [2024-11-28 03:05:20,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36722 conditions, 5997 events. 3354/5997 cut-off events. For 76983/76983 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41184 event pairs, 2060 based on Foata normal form. 27/6024 useless extension candidates. Maximal degree in co-relation 36639. Up to 4791 conditions per place. [2024-11-28 03:05:20,133 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 364 selfloop transitions, 62 changer transitions 5/432 dead transitions. [2024-11-28 03:05:20,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 432 transitions, 8451 flow [2024-11-28 03:05:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:05:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:05:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 106 transitions. [2024-11-28 03:05:20,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33974358974358976 [2024-11-28 03:05:20,135 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 7268 flow. Second operand 12 states and 106 transitions. [2024-11-28 03:05:20,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 432 transitions, 8451 flow [2024-11-28 03:05:20,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 432 transitions, 8315 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-11-28 03:05:20,659 INFO L231 Difference]: Finished difference. Result has 298 places, 394 transitions, 7232 flow [2024-11-28 03:05:20,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7232, PETRI_PLACES=298, PETRI_TRANSITIONS=394} [2024-11-28 03:05:20,660 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 273 predicate places. [2024-11-28 03:05:20,660 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 394 transitions, 7232 flow [2024-11-28 03:05:20,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:20,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:20,661 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:20,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 03:05:20,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:05:20,861 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:20,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1214656137, now seen corresponding path program 21 times [2024-11-28 03:05:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:20,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686053067] [2024-11-28 03:05:20,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:20,895 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:20,895 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686053067] [2024-11-28 03:05:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686053067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567705230] [2024-11-28 03:05:21,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:21,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:21,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:21,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:05:21,708 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:21,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:21,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:05:21,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:22,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:22,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:22,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2024-11-28 03:05:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567705230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:22,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:22,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2024-11-28 03:05:22,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600535617] [2024-11-28 03:05:22,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:22,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:05:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:22,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:05:22,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:05:22,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:22,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 394 transitions, 7232 flow. Second operand has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 23 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:05:22,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:22,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:22,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:25,000 INFO L124 PetriNetUnfolderBase]: 3374/6038 cut-off events. [2024-11-28 03:05:25,001 INFO L125 PetriNetUnfolderBase]: For 84622/84622 co-relation queries the response was YES. [2024-11-28 03:05:25,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38163 conditions, 6038 events. 3374/6038 cut-off events. For 84622/84622 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41636 event pairs, 1848 based on Foata normal form. 18/6056 useless extension candidates. Maximal degree in co-relation 38079. Up to 4131 conditions per place. [2024-11-28 03:05:25,092 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 320 selfloop transitions, 126 changer transitions 5/452 dead transitions. [2024-11-28 03:05:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 452 transitions, 8710 flow [2024-11-28 03:05:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:05:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:05:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 141 transitions. [2024-11-28 03:05:25,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3389423076923077 [2024-11-28 03:05:25,094 INFO L175 Difference]: Start difference. First operand has 298 places, 394 transitions, 7232 flow. Second operand 16 states and 141 transitions. [2024-11-28 03:05:25,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 452 transitions, 8710 flow [2024-11-28 03:05:25,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 452 transitions, 8586 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-28 03:05:25,661 INFO L231 Difference]: Finished difference. Result has 310 places, 403 transitions, 7595 flow [2024-11-28 03:05:25,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7071, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7595, PETRI_PLACES=310, PETRI_TRANSITIONS=403} [2024-11-28 03:05:25,662 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2024-11-28 03:05:25,663 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 403 transitions, 7595 flow [2024-11-28 03:05:25,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 23 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 03:05:25,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:25,663 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:25,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:25,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:05:25,864 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:25,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash 989349267, now seen corresponding path program 22 times [2024-11-28 03:05:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:25,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396093385] [2024-11-28 03:05:25,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:25,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:25,896 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:25,896 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396093385] [2024-11-28 03:05:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396093385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463653546] [2024-11-28 03:05:27,094 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:27,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:27,096 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:27,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:05:27,292 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:27,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:27,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:05:27,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:27,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-28 03:05:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:27,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:28,075 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:05:28,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2024-11-28 03:05:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463653546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:28,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:28,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-11-28 03:05:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954960904] [2024-11-28 03:05:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:28,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:05:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:28,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:05:28,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:05:28,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:28,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 403 transitions, 7595 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:05:28,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:28,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:28,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:31,001 INFO L124 PetriNetUnfolderBase]: 3461/6206 cut-off events. [2024-11-28 03:05:31,002 INFO L125 PetriNetUnfolderBase]: For 96531/96531 co-relation queries the response was YES. [2024-11-28 03:05:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40928 conditions, 6206 events. 3461/6206 cut-off events. For 96531/96531 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42829 event pairs, 1048 based on Foata normal form. 21/6227 useless extension candidates. Maximal degree in co-relation 40839. Up to 2140 conditions per place. [2024-11-28 03:05:31,128 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 305 selfloop transitions, 215 changer transitions 10/531 dead transitions. [2024-11-28 03:05:31,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 531 transitions, 10034 flow [2024-11-28 03:05:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:05:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:05:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 217 transitions. [2024-11-28 03:05:31,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4392712550607287 [2024-11-28 03:05:31,130 INFO L175 Difference]: Start difference. First operand has 310 places, 403 transitions, 7595 flow. Second operand 19 states and 217 transitions. [2024-11-28 03:05:31,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 531 transitions, 10034 flow [2024-11-28 03:05:31,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 531 transitions, 9902 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-11-28 03:05:31,880 INFO L231 Difference]: Finished difference. Result has 328 places, 427 transitions, 8702 flow [2024-11-28 03:05:31,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8702, PETRI_PLACES=328, PETRI_TRANSITIONS=427} [2024-11-28 03:05:31,881 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 303 predicate places. [2024-11-28 03:05:31,881 INFO L471 AbstractCegarLoop]: Abstraction has has 328 places, 427 transitions, 8702 flow [2024-11-28 03:05:31,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:05:31,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:31,882 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:31,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:05:32,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 03:05:32,083 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:32,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -584438941, now seen corresponding path program 23 times [2024-11-28 03:05:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254582067] [2024-11-28 03:05:32,084 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:32,110 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:32,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:05:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254582067] [2024-11-28 03:05:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254582067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693610144] [2024-11-28 03:05:32,829 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:32,831 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:05:33,054 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:33,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:33,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:05:33,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:33,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:33,490 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:05:33,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-11-28 03:05:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:33,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693610144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:33,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:33,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 03:05:33,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526327625] [2024-11-28 03:05:33,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:33,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:05:33,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:33,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:05:33,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:05:33,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:33,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 427 transitions, 8702 flow. Second operand has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 18 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 03:05:33,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:33,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:33,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:36,083 INFO L124 PetriNetUnfolderBase]: 3547/6350 cut-off events. [2024-11-28 03:05:36,084 INFO L125 PetriNetUnfolderBase]: For 110308/110308 co-relation queries the response was YES. [2024-11-28 03:05:36,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43635 conditions, 6350 events. 3547/6350 cut-off events. For 110308/110308 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44012 event pairs, 863 based on Foata normal form. 10/6360 useless extension candidates. Maximal degree in co-relation 43540. Up to 2819 conditions per place. [2024-11-28 03:05:36,154 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 336 selfloop transitions, 153 changer transitions 3/493 dead transitions. [2024-11-28 03:05:36,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 493 transitions, 10603 flow [2024-11-28 03:05:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:05:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:05:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-11-28 03:05:36,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-11-28 03:05:36,155 INFO L175 Difference]: Start difference. First operand has 328 places, 427 transitions, 8702 flow. Second operand 11 states and 121 transitions. [2024-11-28 03:05:36,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 493 transitions, 10603 flow [2024-11-28 03:05:36,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 493 transitions, 10402 flow, removed 57 selfloop flow, removed 12 redundant places. [2024-11-28 03:05:36,922 INFO L231 Difference]: Finished difference. Result has 328 places, 435 transitions, 9062 flow [2024-11-28 03:05:36,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9062, PETRI_PLACES=328, PETRI_TRANSITIONS=435} [2024-11-28 03:05:36,923 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 303 predicate places. [2024-11-28 03:05:36,923 INFO L471 AbstractCegarLoop]: Abstraction has has 328 places, 435 transitions, 9062 flow [2024-11-28 03:05:36,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 18 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 03:05:36,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:36,923 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:36,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:05:37,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 03:05:37,124 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:37,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash 659230531, now seen corresponding path program 24 times [2024-11-28 03:05:37,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:37,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194789495] [2024-11-28 03:05:37,125 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:37,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:37,160 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:05:37,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:37,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194789495] [2024-11-28 03:05:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194789495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:37,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104207290] [2024-11-28 03:05:37,733 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:37,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:37,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:37,736 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:37,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:05:37,931 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:05:37,931 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:37,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:05:37,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:38,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:38,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:38,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2024-11-28 03:05:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104207290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:38,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:05:38,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489591006] [2024-11-28 03:05:38,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:38,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:05:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:38,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:05:38,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:05:38,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:38,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 435 transitions, 9062 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:38,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:38,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:38,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:41,923 INFO L124 PetriNetUnfolderBase]: 3577/6398 cut-off events. [2024-11-28 03:05:41,923 INFO L125 PetriNetUnfolderBase]: For 113322/113322 co-relation queries the response was YES. [2024-11-28 03:05:42,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 6398 events. 3577/6398 cut-off events. For 113322/113322 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 44688 event pairs, 1739 based on Foata normal form. 21/6419 useless extension candidates. Maximal degree in co-relation 44185. Up to 4377 conditions per place. [2024-11-28 03:05:42,037 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 336 selfloop transitions, 162 changer transitions 13/512 dead transitions. [2024-11-28 03:05:42,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 512 transitions, 10763 flow [2024-11-28 03:05:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:05:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:05:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 186 transitions. [2024-11-28 03:05:42,038 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3765182186234818 [2024-11-28 03:05:42,039 INFO L175 Difference]: Start difference. First operand has 328 places, 435 transitions, 9062 flow. Second operand 19 states and 186 transitions. [2024-11-28 03:05:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 512 transitions, 10763 flow [2024-11-28 03:05:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 512 transitions, 10443 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-11-28 03:05:42,967 INFO L231 Difference]: Finished difference. Result has 339 places, 436 transitions, 9121 flow [2024-11-28 03:05:42,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8635, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9121, PETRI_PLACES=339, PETRI_TRANSITIONS=436} [2024-11-28 03:05:42,968 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 314 predicate places. [2024-11-28 03:05:42,968 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 436 transitions, 9121 flow [2024-11-28 03:05:42,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:42,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:42,968 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:42,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:05:43,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:05:43,169 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:43,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1997282401, now seen corresponding path program 25 times [2024-11-28 03:05:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998735307] [2024-11-28 03:05:43,170 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998735307] [2024-11-28 03:05:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998735307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035892278] [2024-11-28 03:05:43,722 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:43,727 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:05:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:43,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:05:43,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:44,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-28 03:05:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:44,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:44,521 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:05:44,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2024-11-28 03:05:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:44,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035892278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:44,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:44,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-11-28 03:05:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870340055] [2024-11-28 03:05:44,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:44,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:05:44,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:44,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:05:44,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:05:44,560 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:44,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 436 transitions, 9121 flow. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 03:05:44,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:44,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:44,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:47,488 INFO L124 PetriNetUnfolderBase]: 3583/6386 cut-off events. [2024-11-28 03:05:47,489 INFO L125 PetriNetUnfolderBase]: For 113022/113022 co-relation queries the response was YES. [2024-11-28 03:05:47,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44534 conditions, 6386 events. 3583/6386 cut-off events. For 113022/113022 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44038 event pairs, 1140 based on Foata normal form. 21/6407 useless extension candidates. Maximal degree in co-relation 44440. Up to 1950 conditions per place. [2024-11-28 03:05:47,635 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 272 selfloop transitions, 206 changer transitions 15/494 dead transitions. [2024-11-28 03:05:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 494 transitions, 10559 flow [2024-11-28 03:05:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:05:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:05:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-11-28 03:05:47,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-11-28 03:05:47,637 INFO L175 Difference]: Start difference. First operand has 339 places, 436 transitions, 9121 flow. Second operand 15 states and 153 transitions. [2024-11-28 03:05:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 494 transitions, 10559 flow [2024-11-28 03:05:48,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 494 transitions, 10279 flow, removed 27 selfloop flow, removed 12 redundant places. [2024-11-28 03:05:48,645 INFO L231 Difference]: Finished difference. Result has 341 places, 428 transitions, 9108 flow [2024-11-28 03:05:48,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8666, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9108, PETRI_PLACES=341, PETRI_TRANSITIONS=428} [2024-11-28 03:05:48,646 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 316 predicate places. [2024-11-28 03:05:48,646 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 428 transitions, 9108 flow [2024-11-28 03:05:48,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 03:05:48,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:48,647 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:48,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:05:48,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:48,848 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:48,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 963200625, now seen corresponding path program 26 times [2024-11-28 03:05:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:48,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909956115] [2024-11-28 03:05:48,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:48,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:48,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909956115] [2024-11-28 03:05:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909956115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444297616] [2024-11-28 03:05:49,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:49,462 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:49,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:05:49,646 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:49,647 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:49,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:05:49,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:49,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:50,229 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:05:50,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2024-11-28 03:05:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444297616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:50,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2024-11-28 03:05:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131003599] [2024-11-28 03:05:50,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:50,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:05:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:50,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:05:50,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:05:50,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 428 transitions, 9108 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:50,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:52,755 INFO L124 PetriNetUnfolderBase]: 3640/6470 cut-off events. [2024-11-28 03:05:52,755 INFO L125 PetriNetUnfolderBase]: For 114867/114867 co-relation queries the response was YES. [2024-11-28 03:05:52,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45737 conditions, 6470 events. 3640/6470 cut-off events. For 114867/114867 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 44723 event pairs, 848 based on Foata normal form. 12/6482 useless extension candidates. Maximal degree in co-relation 45644. Up to 2857 conditions per place. [2024-11-28 03:05:52,872 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 305 selfloop transitions, 204 changer transitions 4/514 dead transitions. [2024-11-28 03:05:52,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 514 transitions, 11449 flow [2024-11-28 03:05:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:05:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:05:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-11-28 03:05:52,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-28 03:05:52,875 INFO L175 Difference]: Start difference. First operand has 341 places, 428 transitions, 9108 flow. Second operand 12 states and 117 transitions. [2024-11-28 03:05:52,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 514 transitions, 11449 flow [2024-11-28 03:05:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 514 transitions, 10903 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-11-28 03:05:53,976 INFO L231 Difference]: Finished difference. Result has 341 places, 445 transitions, 9420 flow [2024-11-28 03:05:53,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9420, PETRI_PLACES=341, PETRI_TRANSITIONS=445} [2024-11-28 03:05:53,977 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 316 predicate places. [2024-11-28 03:05:53,978 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 445 transitions, 9420 flow [2024-11-28 03:05:53,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:53,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:53,978 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:53,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:54,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 03:05:54,179 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:54,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1715649527, now seen corresponding path program 27 times [2024-11-28 03:05:54,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:54,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633673074] [2024-11-28 03:05:54,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:54,216 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:54,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:54,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:54,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633673074] [2024-11-28 03:05:54,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633673074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:54,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233501662] [2024-11-28 03:05:54,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:54,748 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:54,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:05:54,928 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:54,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:54,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:05:54,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:55,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2024-11-28 03:05:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:55,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:55,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:05:55,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2024-11-28 03:05:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:05:55,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233501662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:55,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:55,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2024-11-28 03:05:55,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008509959] [2024-11-28 03:05:55,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:55,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:05:55,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:55,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:05:55,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:05:55,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:05:55,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 445 transitions, 9420 flow. Second operand has 21 states, 21 states have (on average 6.0476190476190474) internal successors, (127), 21 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:55,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:55,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:05:55,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:58,095 INFO L124 PetriNetUnfolderBase]: 3475/6155 cut-off events. [2024-11-28 03:05:58,095 INFO L125 PetriNetUnfolderBase]: For 114445/114445 co-relation queries the response was YES. [2024-11-28 03:05:58,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44725 conditions, 6155 events. 3475/6155 cut-off events. For 114445/114445 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42219 event pairs, 1710 based on Foata normal form. 15/6170 useless extension candidates. Maximal degree in co-relation 44633. Up to 4440 conditions per place. [2024-11-28 03:05:58,227 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 338 selfloop transitions, 152 changer transitions 4/495 dead transitions. [2024-11-28 03:05:58,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 495 transitions, 10850 flow [2024-11-28 03:05:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:05:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:05:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 131 transitions. [2024-11-28 03:05:58,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3598901098901099 [2024-11-28 03:05:58,229 INFO L175 Difference]: Start difference. First operand has 341 places, 445 transitions, 9420 flow. Second operand 14 states and 131 transitions. [2024-11-28 03:05:58,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 495 transitions, 10850 flow [2024-11-28 03:05:59,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 495 transitions, 10269 flow, removed 189 selfloop flow, removed 9 redundant places. [2024-11-28 03:05:59,252 INFO L231 Difference]: Finished difference. Result has 347 places, 446 transitions, 9298 flow [2024-11-28 03:05:59,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9298, PETRI_PLACES=347, PETRI_TRANSITIONS=446} [2024-11-28 03:05:59,253 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 322 predicate places. [2024-11-28 03:05:59,253 INFO L471 AbstractCegarLoop]: Abstraction has has 347 places, 446 transitions, 9298 flow [2024-11-28 03:05:59,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0476190476190474) internal successors, (127), 21 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:59,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:59,254 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:59,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:05:59,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-28 03:05:59,454 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:59,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1354211885, now seen corresponding path program 28 times [2024-11-28 03:05:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386377327] [2024-11-28 03:05:59,455 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:59,487 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:59,487 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386377327] [2024-11-28 03:06:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386377327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:00,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:06:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758373739] [2024-11-28 03:06:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:00,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:06:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:00,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:06:00,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:06:00,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 446 transitions, 9298 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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 03:06:00,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:00,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:00,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:02,403 INFO L124 PetriNetUnfolderBase]: 3477/6165 cut-off events. [2024-11-28 03:06:02,403 INFO L125 PetriNetUnfolderBase]: For 97910/97910 co-relation queries the response was YES. [2024-11-28 03:06:02,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41068 conditions, 6165 events. 3477/6165 cut-off events. For 97910/97910 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42389 event pairs, 2288 based on Foata normal form. 2/6155 useless extension candidates. Maximal degree in co-relation 40979. Up to 5571 conditions per place. [2024-11-28 03:06:02,494 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 414 selfloop transitions, 50 changer transitions 4/469 dead transitions. [2024-11-28 03:06:02,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 10409 flow [2024-11-28 03:06:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:06:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:06:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-11-28 03:06:02,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3547008547008547 [2024-11-28 03:06:02,495 INFO L175 Difference]: Start difference. First operand has 347 places, 446 transitions, 9298 flow. Second operand 9 states and 83 transitions. [2024-11-28 03:06:02,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 10409 flow [2024-11-28 03:06:03,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 469 transitions, 10293 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-28 03:06:03,188 INFO L231 Difference]: Finished difference. Result has 349 places, 447 transitions, 9298 flow [2024-11-28 03:06:03,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9182, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9298, PETRI_PLACES=349, PETRI_TRANSITIONS=447} [2024-11-28 03:06:03,189 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2024-11-28 03:06:03,189 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 447 transitions, 9298 flow [2024-11-28 03:06:03,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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 03:06:03,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:03,189 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:03,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-11-28 03:06:03,190 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:03,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1717816901, now seen corresponding path program 29 times [2024-11-28 03:06:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656674370] [2024-11-28 03:06:03,191 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:03,211 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:03,211 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:03,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656674370] [2024-11-28 03:06:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656674370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095630] [2024-11-28 03:06:03,939 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:03,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:03,941 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:03,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:06:04,137 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:04,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:04,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:06:04,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:04,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:06:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:04,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:04,748 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:04,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2024-11-28 03:06:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:04,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:04,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-28 03:06:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448206502] [2024-11-28 03:06:04,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:04,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:06:04,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:04,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:06:04,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:06:04,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:04,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 447 transitions, 9298 flow. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 03:06:04,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:04,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:04,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:07,191 INFO L124 PetriNetUnfolderBase]: 3472/6154 cut-off events. [2024-11-28 03:06:07,191 INFO L125 PetriNetUnfolderBase]: For 95316/95316 co-relation queries the response was YES. [2024-11-28 03:06:07,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40987 conditions, 6154 events. 3472/6154 cut-off events. For 95316/95316 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 42026 event pairs, 1542 based on Foata normal form. 2/6144 useless extension candidates. Maximal degree in co-relation 40897. Up to 2800 conditions per place. [2024-11-28 03:06:07,303 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 312 selfloop transitions, 145 changer transitions 10/468 dead transitions. [2024-11-28 03:06:07,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 468 transitions, 10351 flow [2024-11-28 03:06:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:06:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:06:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2024-11-28 03:06:07,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3346153846153846 [2024-11-28 03:06:07,305 INFO L175 Difference]: Start difference. First operand has 349 places, 447 transitions, 9298 flow. Second operand 10 states and 87 transitions. [2024-11-28 03:06:07,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 468 transitions, 10351 flow [2024-11-28 03:06:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 468 transitions, 10254 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-28 03:06:08,267 INFO L231 Difference]: Finished difference. Result has 353 places, 443 transitions, 9426 flow [2024-11-28 03:06:08,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9183, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9426, PETRI_PLACES=353, PETRI_TRANSITIONS=443} [2024-11-28 03:06:08,268 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 328 predicate places. [2024-11-28 03:06:08,268 INFO L471 AbstractCegarLoop]: Abstraction has has 353 places, 443 transitions, 9426 flow [2024-11-28 03:06:08,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 03:06:08,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:08,268 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:08,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:08,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 03:06:08,469 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:08,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1842583133, now seen corresponding path program 30 times [2024-11-28 03:06:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702473737] [2024-11-28 03:06:08,470 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:06:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:08,495 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:06:08,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:08,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702473737] [2024-11-28 03:06:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702473737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528200697] [2024-11-28 03:06:08,836 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:06:08,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:08,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:08,839 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:08,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:06:09,038 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:06:09,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:09,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:06:09,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:09,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-28 03:06:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:09,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:09,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:09,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2024-11-28 03:06:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528200697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:09,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:09,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 17 [2024-11-28 03:06:09,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778002585] [2024-11-28 03:06:09,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:09,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:06:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:09,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:06:09,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:06:09,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:09,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 443 transitions, 9426 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 03:06:09,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:09,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:09,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:11,662 INFO L124 PetriNetUnfolderBase]: 3472/6144 cut-off events. [2024-11-28 03:06:11,662 INFO L125 PetriNetUnfolderBase]: For 104458/104458 co-relation queries the response was YES. [2024-11-28 03:06:11,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42429 conditions, 6144 events. 3472/6144 cut-off events. For 104458/104458 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42069 event pairs, 2204 based on Foata normal form. 22/6154 useless extension candidates. Maximal degree in co-relation 42338. Up to 5318 conditions per place. [2024-11-28 03:06:11,761 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 410 selfloop transitions, 54 changer transitions 3/468 dead transitions. [2024-11-28 03:06:11,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 468 transitions, 10494 flow [2024-11-28 03:06:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:06:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:06:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-28 03:06:11,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2024-11-28 03:06:11,762 INFO L175 Difference]: Start difference. First operand has 353 places, 443 transitions, 9426 flow. Second operand 9 states and 89 transitions. [2024-11-28 03:06:11,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 468 transitions, 10494 flow [2024-11-28 03:06:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 468 transitions, 10172 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-11-28 03:06:12,489 INFO L231 Difference]: Finished difference. Result has 348 places, 438 transitions, 9152 flow [2024-11-28 03:06:12,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8958, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9152, PETRI_PLACES=348, PETRI_TRANSITIONS=438} [2024-11-28 03:06:12,490 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2024-11-28 03:06:12,490 INFO L471 AbstractCegarLoop]: Abstraction has has 348 places, 438 transitions, 9152 flow [2024-11-28 03:06:12,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 03:06:12,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:12,490 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:12,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:06:12,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 03:06:12,691 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:12,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 938575087, now seen corresponding path program 31 times [2024-11-28 03:06:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:12,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174009899] [2024-11-28 03:06:12,692 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:06:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:13,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174009899] [2024-11-28 03:06:13,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174009899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856683897] [2024-11-28 03:06:13,086 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:06:13,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:13,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:13,088 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:13,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:06:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:13,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:06:13,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:13,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-28 03:06:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:13,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:14,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:14,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2024-11-28 03:06:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856683897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:14,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-11-28 03:06:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763144978] [2024-11-28 03:06:14,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:14,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:06:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:14,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:06:14,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:06:14,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:14,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 438 transitions, 9152 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:06:14,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:14,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:14,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:17,603 INFO L124 PetriNetUnfolderBase]: 3556/6264 cut-off events. [2024-11-28 03:06:17,603 INFO L125 PetriNetUnfolderBase]: For 98906/98906 co-relation queries the response was YES. [2024-11-28 03:06:17,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41555 conditions, 6264 events. 3556/6264 cut-off events. For 98906/98906 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 42917 event pairs, 1760 based on Foata normal form. 14/6266 useless extension candidates. Maximal degree in co-relation 41466. Up to 4255 conditions per place. [2024-11-28 03:06:17,806 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 375 selfloop transitions, 164 changer transitions 14/554 dead transitions. [2024-11-28 03:06:17,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 554 transitions, 11072 flow [2024-11-28 03:06:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:06:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:06:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 273 transitions. [2024-11-28 03:06:17,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-28 03:06:17,808 INFO L175 Difference]: Start difference. First operand has 348 places, 438 transitions, 9152 flow. Second operand 30 states and 273 transitions. [2024-11-28 03:06:17,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 554 transitions, 11072 flow [2024-11-28 03:06:18,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 554 transitions, 10902 flow, removed 16 selfloop flow, removed 13 redundant places. [2024-11-28 03:06:18,487 INFO L231 Difference]: Finished difference. Result has 366 places, 450 transitions, 9514 flow [2024-11-28 03:06:18,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9514, PETRI_PLACES=366, PETRI_TRANSITIONS=450} [2024-11-28 03:06:18,488 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 341 predicate places. [2024-11-28 03:06:18,488 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 450 transitions, 9514 flow [2024-11-28 03:06:18,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 03:06:18,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:18,488 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:18,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:06:18,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 03:06:18,689 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:18,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 407709443, now seen corresponding path program 32 times [2024-11-28 03:06:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:18,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309025950] [2024-11-28 03:06:18,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:18,711 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:18,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:19,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:19,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309025950] [2024-11-28 03:06:19,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309025950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:19,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178804610] [2024-11-28 03:06:19,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:19,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:19,189 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:19,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:06:19,383 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:19,383 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:19,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:06:19,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:19,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:06:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:19,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:20,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:20,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 69 [2024-11-28 03:06:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178804610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:20,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:20,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:06:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45576754] [2024-11-28 03:06:20,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:20,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:06:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:20,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:06:20,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:06:20,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:20,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 450 transitions, 9514 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:20,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:20,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:20,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:22,837 INFO L124 PetriNetUnfolderBase]: 3525/6189 cut-off events. [2024-11-28 03:06:22,837 INFO L125 PetriNetUnfolderBase]: For 97944/97944 co-relation queries the response was YES. [2024-11-28 03:06:22,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41976 conditions, 6189 events. 3525/6189 cut-off events. For 97944/97944 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42162 event pairs, 1882 based on Foata normal form. 3/6180 useless extension candidates. Maximal degree in co-relation 41889. Up to 4557 conditions per place. [2024-11-28 03:06:22,976 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 389 selfloop transitions, 82 changer transitions 11/483 dead transitions. [2024-11-28 03:06:22,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 483 transitions, 10672 flow [2024-11-28 03:06:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:06:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:06:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 109 transitions. [2024-11-28 03:06:22,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34935897435897434 [2024-11-28 03:06:22,977 INFO L175 Difference]: Start difference. First operand has 366 places, 450 transitions, 9514 flow. Second operand 12 states and 109 transitions. [2024-11-28 03:06:22,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 483 transitions, 10672 flow [2024-11-28 03:06:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 483 transitions, 10395 flow, removed 59 selfloop flow, removed 16 redundant places. [2024-11-28 03:06:23,884 INFO L231 Difference]: Finished difference. Result has 359 places, 442 transitions, 9260 flow [2024-11-28 03:06:23,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9124, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9260, PETRI_PLACES=359, PETRI_TRANSITIONS=442} [2024-11-28 03:06:23,885 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 334 predicate places. [2024-11-28 03:06:23,885 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 442 transitions, 9260 flow [2024-11-28 03:06:23,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:23,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:23,885 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:23,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:24,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 03:06:24,086 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:24,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1593696323, now seen corresponding path program 33 times [2024-11-28 03:06:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017499652] [2024-11-28 03:06:24,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:24,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:24,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:06:24,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017499652] [2024-11-28 03:06:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017499652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994621133] [2024-11-28 03:06:25,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:25,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:25,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:25,082 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:25,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:06:25,294 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:06:25,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:25,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:06:25,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:25,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2024-11-28 03:06:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:25,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:25,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:25,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2024-11-28 03:06:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:26,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994621133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:26,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:26,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-28 03:06:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062483667] [2024-11-28 03:06:26,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:26,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:06:26,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:26,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:06:26,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:06:26,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:26,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 442 transitions, 9260 flow. Second operand has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 24 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 03:06:26,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:26,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:26,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:28,666 INFO L124 PetriNetUnfolderBase]: 3500/6113 cut-off events. [2024-11-28 03:06:28,666 INFO L125 PetriNetUnfolderBase]: For 96702/96702 co-relation queries the response was YES. [2024-11-28 03:06:28,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41467 conditions, 6113 events. 3500/6113 cut-off events. For 96702/96702 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 41423 event pairs, 1601 based on Foata normal form. 2/6103 useless extension candidates. Maximal degree in co-relation 41381. Up to 3714 conditions per place. [2024-11-28 03:06:28,813 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 307 selfloop transitions, 160 changer transitions 8/476 dead transitions. [2024-11-28 03:06:28,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 476 transitions, 10355 flow [2024-11-28 03:06:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:06:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:06:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 133 transitions. [2024-11-28 03:06:28,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2841880341880342 [2024-11-28 03:06:28,814 INFO L175 Difference]: Start difference. First operand has 359 places, 442 transitions, 9260 flow. Second operand 18 states and 133 transitions. [2024-11-28 03:06:28,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 476 transitions, 10355 flow [2024-11-28 03:06:29,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 476 transitions, 10276 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-11-28 03:06:29,613 INFO L231 Difference]: Finished difference. Result has 359 places, 434 transitions, 9363 flow [2024-11-28 03:06:29,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9099, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9363, PETRI_PLACES=359, PETRI_TRANSITIONS=434} [2024-11-28 03:06:29,614 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 334 predicate places. [2024-11-28 03:06:29,614 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 434 transitions, 9363 flow [2024-11-28 03:06:29,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.666666666666667) internal successors, (136), 24 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 03:06:29,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:29,614 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:29,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:06:29,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:06:29,815 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:29,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:29,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1834359173, now seen corresponding path program 34 times [2024-11-28 03:06:29,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:29,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625089511] [2024-11-28 03:06:29,816 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:06:29,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:29,842 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:06:29,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625089511] [2024-11-28 03:06:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625089511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:30,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019341261] [2024-11-28 03:06:30,388 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:06:30,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:30,391 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:30,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:06:30,607 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:06:30,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:30,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:06:30,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:30,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2024-11-28 03:06:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:30,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:31,051 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:31,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2024-11-28 03:06:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:31,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019341261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:31,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-28 03:06:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512754130] [2024-11-28 03:06:31,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:31,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:06:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:31,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:06:31,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:06:31,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 434 transitions, 9363 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 03:06:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:33,560 INFO L124 PetriNetUnfolderBase]: 3484/6061 cut-off events. [2024-11-28 03:06:33,560 INFO L125 PetriNetUnfolderBase]: For 99457/99457 co-relation queries the response was YES. [2024-11-28 03:06:33,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41685 conditions, 6061 events. 3484/6061 cut-off events. For 99457/99457 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40540 event pairs, 1567 based on Foata normal form. 2/6051 useless extension candidates. Maximal degree in co-relation 41601. Up to 2806 conditions per place. [2024-11-28 03:06:33,693 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 303 selfloop transitions, 140 changer transitions 8/452 dead transitions. [2024-11-28 03:06:33,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 452 transitions, 10296 flow [2024-11-28 03:06:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:06:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:06:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-11-28 03:06:33,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3504273504273504 [2024-11-28 03:06:33,694 INFO L175 Difference]: Start difference. First operand has 359 places, 434 transitions, 9363 flow. Second operand 9 states and 82 transitions. [2024-11-28 03:06:33,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 452 transitions, 10296 flow [2024-11-28 03:06:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 452 transitions, 10132 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-11-28 03:06:34,500 INFO L231 Difference]: Finished difference. Result has 348 places, 427 transitions, 9316 flow [2024-11-28 03:06:34,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9316, PETRI_PLACES=348, PETRI_TRANSITIONS=427} [2024-11-28 03:06:34,501 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2024-11-28 03:06:34,501 INFO L471 AbstractCegarLoop]: Abstraction has has 348 places, 427 transitions, 9316 flow [2024-11-28 03:06:34,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 03:06:34,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:34,502 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:34,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:34,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:06:34,703 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:34,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash -615956348, now seen corresponding path program 35 times [2024-11-28 03:06:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:34,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957544614] [2024-11-28 03:06:34,704 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:34,735 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:34,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:36,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:36,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957544614] [2024-11-28 03:06:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957544614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:36,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639586478] [2024-11-28 03:06:36,016 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:36,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:36,019 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:36,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:06:36,231 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:36,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:36,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:06:36,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:36,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 102 [2024-11-28 03:06:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:37,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:39,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:39,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 96 [2024-11-28 03:06:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:39,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639586478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:39,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:39,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2024-11-28 03:06:39,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622505564] [2024-11-28 03:06:39,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:39,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 03:06:39,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:39,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 03:06:39,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:06:39,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:39,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 427 transitions, 9316 flow. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 03:06:39,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:39,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:39,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:44,655 INFO L124 PetriNetUnfolderBase]: 4918/8667 cut-off events. [2024-11-28 03:06:44,655 INFO L125 PetriNetUnfolderBase]: For 158217/158217 co-relation queries the response was YES. [2024-11-28 03:06:44,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60278 conditions, 8667 events. 4918/8667 cut-off events. For 158217/158217 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 61658 event pairs, 789 based on Foata normal form. 12/8667 useless extension candidates. Maximal degree in co-relation 60196. Up to 3130 conditions per place. [2024-11-28 03:06:44,814 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 478 selfloop transitions, 248 changer transitions 21/748 dead transitions. [2024-11-28 03:06:44,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 748 transitions, 16287 flow [2024-11-28 03:06:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:06:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:06:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 217 transitions. [2024-11-28 03:06:44,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4173076923076923 [2024-11-28 03:06:44,816 INFO L175 Difference]: Start difference. First operand has 348 places, 427 transitions, 9316 flow. Second operand 20 states and 217 transitions. [2024-11-28 03:06:44,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 748 transitions, 16287 flow [2024-11-28 03:06:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 748 transitions, 15861 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:06:46,102 INFO L231 Difference]: Finished difference. Result has 371 places, 513 transitions, 11773 flow [2024-11-28 03:06:46,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11773, PETRI_PLACES=371, PETRI_TRANSITIONS=513} [2024-11-28 03:06:46,103 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 346 predicate places. [2024-11-28 03:06:46,103 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 513 transitions, 11773 flow [2024-11-28 03:06:46,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 03:06:46,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:46,104 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:46,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 03:06:46,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:46,305 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:46,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1900555204, now seen corresponding path program 36 times [2024-11-28 03:06:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782121308] [2024-11-28 03:06:46,305 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:06:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:46,336 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:06:46,336 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782121308] [2024-11-28 03:06:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782121308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204825042] [2024-11-28 03:06:47,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:06:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:47,089 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:47,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:06:47,309 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:06:47,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:47,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:06:47,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:47,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:06:47,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 03:06:47,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2024-11-28 03:06:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:48,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:06:51,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204825042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:51,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 31 [2024-11-28 03:06:51,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258964988] [2024-11-28 03:06:51,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:51,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 03:06:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:51,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 03:06:51,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:06:51,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:06:51,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 513 transitions, 11773 flow. Second operand has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 03:06:51,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:51,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:06:51,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:02,260 INFO L124 PetriNetUnfolderBase]: 5010/8911 cut-off events. [2024-11-28 03:07:02,260 INFO L125 PetriNetUnfolderBase]: For 186868/186868 co-relation queries the response was YES. [2024-11-28 03:07:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68079 conditions, 8911 events. 5010/8911 cut-off events. For 186868/186868 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 63438 event pairs, 962 based on Foata normal form. 8/8911 useless extension candidates. Maximal degree in co-relation 67984. Up to 4029 conditions per place. [2024-11-28 03:07:02,435 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 512 selfloop transitions, 273 changer transitions 23/809 dead transitions. [2024-11-28 03:07:02,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 809 transitions, 18050 flow [2024-11-28 03:07:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:07:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 03:07:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 332 transitions. [2024-11-28 03:07:02,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2024-11-28 03:07:02,437 INFO L175 Difference]: Start difference. First operand has 371 places, 513 transitions, 11773 flow. Second operand 32 states and 332 transitions. [2024-11-28 03:07:02,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 809 transitions, 18050 flow [2024-11-28 03:07:03,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 809 transitions, 17911 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-11-28 03:07:04,003 INFO L231 Difference]: Finished difference. Result has 408 places, 569 transitions, 13529 flow [2024-11-28 03:07:04,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11640, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13529, PETRI_PLACES=408, PETRI_TRANSITIONS=569} [2024-11-28 03:07:04,004 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 383 predicate places. [2024-11-28 03:07:04,004 INFO L471 AbstractCegarLoop]: Abstraction has has 408 places, 569 transitions, 13529 flow [2024-11-28 03:07:04,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 03:07:04,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:04,004 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:07:04,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 03:07:04,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-28 03:07:04,205 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:07:04,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -616600384, now seen corresponding path program 37 times [2024-11-28 03:07:04,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:04,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967459055] [2024-11-28 03:07:04,206 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:07:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:07:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:05,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967459055] [2024-11-28 03:07:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967459055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313923305] [2024-11-28 03:07:05,445 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:07:05,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:05,450 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:05,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:07:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:07:05,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:07:05,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:06,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 118 [2024-11-28 03:07:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:06,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:09,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:07:09,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 231 [2024-11-28 03:07:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:09,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313923305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:09,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:09,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2024-11-28 03:07:09,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72430630] [2024-11-28 03:07:09,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:09,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:07:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:09,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:07:09,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:07:09,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:07:09,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 569 transitions, 13529 flow. Second operand has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 03:07:09,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:09,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:07:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:22,887 INFO L124 PetriNetUnfolderBase]: 5746/10318 cut-off events. [2024-11-28 03:07:22,888 INFO L125 PetriNetUnfolderBase]: For 235462/235462 co-relation queries the response was YES. [2024-11-28 03:07:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80461 conditions, 10318 events. 5746/10318 cut-off events. For 235462/235462 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 76194 event pairs, 1110 based on Foata normal form. 14/10324 useless extension candidates. Maximal degree in co-relation 80354. Up to 4641 conditions per place. [2024-11-28 03:07:23,148 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 575 selfloop transitions, 320 changer transitions 44/940 dead transitions. [2024-11-28 03:07:23,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 940 transitions, 21381 flow [2024-11-28 03:07:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 03:07:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-28 03:07:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 421 transitions. [2024-11-28 03:07:23,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4048076923076923 [2024-11-28 03:07:23,151 INFO L175 Difference]: Start difference. First operand has 408 places, 569 transitions, 13529 flow. Second operand 40 states and 421 transitions. [2024-11-28 03:07:23,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 940 transitions, 21381 flow [2024-11-28 03:07:25,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 940 transitions, 20505 flow, removed 187 selfloop flow, removed 16 redundant places. [2024-11-28 03:07:25,941 INFO L231 Difference]: Finished difference. Result has 451 places, 652 transitions, 15531 flow [2024-11-28 03:07:25,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=15531, PETRI_PLACES=451, PETRI_TRANSITIONS=652} [2024-11-28 03:07:25,942 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 426 predicate places. [2024-11-28 03:07:25,943 INFO L471 AbstractCegarLoop]: Abstraction has has 451 places, 652 transitions, 15531 flow [2024-11-28 03:07:25,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 03:07:25,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:25,944 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:07:25,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:07:26,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 03:07:26,144 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:07:26,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -614744836, now seen corresponding path program 38 times [2024-11-28 03:07:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:26,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972087540] [2024-11-28 03:07:26,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:07:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:26,184 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:07:26,184 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972087540] [2024-11-28 03:07:27,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972087540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255004720] [2024-11-28 03:07:27,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:07:27,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:27,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:27,325 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:27,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:07:27,552 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:07:27,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:27,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:07:27,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:28,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 106 [2024-11-28 03:07:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:28,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:31,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:07:31,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 200 [2024-11-28 03:07:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255004720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:31,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:31,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 30 [2024-11-28 03:07:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890082606] [2024-11-28 03:07:31,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:31,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:07:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:31,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:07:31,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:07:31,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:07:31,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 652 transitions, 15531 flow. Second operand has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 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 03:07:31,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:31,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:07:31,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:43,834 INFO L124 PetriNetUnfolderBase]: 6673/12123 cut-off events. [2024-11-28 03:07:43,834 INFO L125 PetriNetUnfolderBase]: For 293862/293862 co-relation queries the response was YES. [2024-11-28 03:07:44,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95242 conditions, 12123 events. 6673/12123 cut-off events. For 293862/293862 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 92146 event pairs, 1340 based on Foata normal form. 15/12130 useless extension candidates. Maximal degree in co-relation 95118. Up to 4965 conditions per place. [2024-11-28 03:07:44,142 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 639 selfloop transitions, 402 changer transitions 43/1085 dead transitions. [2024-11-28 03:07:44,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1085 transitions, 25432 flow [2024-11-28 03:07:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 03:07:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-28 03:07:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 439 transitions. [2024-11-28 03:07:44,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41181988742964354 [2024-11-28 03:07:44,145 INFO L175 Difference]: Start difference. First operand has 451 places, 652 transitions, 15531 flow. Second operand 41 states and 439 transitions. [2024-11-28 03:07:44,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1085 transitions, 25432 flow [2024-11-28 03:07:47,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1085 transitions, 24730 flow, removed 257 selfloop flow, removed 15 redundant places. [2024-11-28 03:07:47,845 INFO L231 Difference]: Finished difference. Result has 489 places, 765 transitions, 18621 flow [2024-11-28 03:07:47,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15006, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=18621, PETRI_PLACES=489, PETRI_TRANSITIONS=765} [2024-11-28 03:07:47,847 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 464 predicate places. [2024-11-28 03:07:47,847 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 765 transitions, 18621 flow [2024-11-28 03:07:47,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 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 03:07:47,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:47,847 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:07:47,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 03:07:48,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:48,048 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:07:48,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2028591232, now seen corresponding path program 39 times [2024-11-28 03:07:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:48,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740437187] [2024-11-28 03:07:48,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:07:48,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:48,081 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:07:48,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740437187] [2024-11-28 03:07:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740437187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210524433] [2024-11-28 03:07:49,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:07:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:49,273 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:49,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:07:49,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:07:49,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:49,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:07:49,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:50,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-11-28 03:07:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:50,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:53,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:07:53,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 198 [2024-11-28 03:07:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:07:53,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210524433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:53,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:53,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2024-11-28 03:07:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003156962] [2024-11-28 03:07:53,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:53,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 03:07:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:53,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 03:07:53,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:07:53,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:07:53,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 765 transitions, 18621 flow. Second operand has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 03:07:53,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:53,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:07:53,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:08:14,056 INFO L124 PetriNetUnfolderBase]: 8432/15394 cut-off events. [2024-11-28 03:08:14,057 INFO L125 PetriNetUnfolderBase]: For 436407/436407 co-relation queries the response was YES. [2024-11-28 03:08:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125554 conditions, 15394 events. 8432/15394 cut-off events. For 436407/436407 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 122651 event pairs, 3218 based on Foata normal form. 17/15403 useless extension candidates. Maximal degree in co-relation 125416. Up to 7370 conditions per place. [2024-11-28 03:08:14,578 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 711 selfloop transitions, 477 changer transitions 45/1234 dead transitions. [2024-11-28 03:08:14,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1234 transitions, 29970 flow [2024-11-28 03:08:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 03:08:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-28 03:08:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 476 transitions. [2024-11-28 03:08:14,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40683760683760684 [2024-11-28 03:08:14,581 INFO L175 Difference]: Start difference. First operand has 489 places, 765 transitions, 18621 flow. Second operand 45 states and 476 transitions. [2024-11-28 03:08:14,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1234 transitions, 29970 flow [2024-11-28 03:08:20,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1234 transitions, 29095 flow, removed 308 selfloop flow, removed 13 redundant places. [2024-11-28 03:08:20,903 INFO L231 Difference]: Finished difference. Result has 533 places, 963 transitions, 24518 flow [2024-11-28 03:08:20,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=17959, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=24518, PETRI_PLACES=533, PETRI_TRANSITIONS=963} [2024-11-28 03:08:20,905 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 508 predicate places. [2024-11-28 03:08:20,905 INFO L471 AbstractCegarLoop]: Abstraction has has 533 places, 963 transitions, 24518 flow [2024-11-28 03:08:20,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 03:08:20,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:08:20,905 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:08:20,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 03:08:21,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:08:21,106 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:08:21,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:08:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1625661228, now seen corresponding path program 40 times [2024-11-28 03:08:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:08:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740284906] [2024-11-28 03:08:21,107 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:08:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:08:21,132 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:08:21,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:08:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:08:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:08:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740284906] [2024-11-28 03:08:22,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740284906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:08:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059751840] [2024-11-28 03:08:22,372 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:08:22,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:08:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:08:22,374 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:08:22,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51016873-5c98-48c7-a7ec-5cc26bcac7c9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:08:22,601 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:08:22,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:08:22,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:08:22,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:08:23,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-11-28 03:08:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:08:23,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:08:26,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:08:26,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 214 [2024-11-28 03:08:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:08:27,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059751840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:08:27,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:08:27,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 34 [2024-11-28 03:08:27,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127115979] [2024-11-28 03:08:27,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:08:27,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 03:08:27,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:08:27,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 03:08:27,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:08:27,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 03:08:27,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 963 transitions, 24518 flow. Second operand has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 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 03:08:27,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:08:27,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 03:08:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:08:45,469 INFO L124 PetriNetUnfolderBase]: 10175/18368 cut-off events. [2024-11-28 03:08:45,469 INFO L125 PetriNetUnfolderBase]: For 616226/616226 co-relation queries the response was YES. [2024-11-28 03:08:46,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157271 conditions, 18368 events. 10175/18368 cut-off events. For 616226/616226 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 148345 event pairs, 4044 based on Foata normal form. 12/18372 useless extension candidates. Maximal degree in co-relation 157120. Up to 8377 conditions per place. [2024-11-28 03:08:46,115 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 881 selfloop transitions, 455 changer transitions 21/1358 dead transitions. [2024-11-28 03:08:46,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1358 transitions, 35914 flow [2024-11-28 03:08:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:08:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-28 03:08:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 343 transitions. [2024-11-28 03:08:46,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3997668997668998 [2024-11-28 03:08:46,118 INFO L175 Difference]: Start difference. First operand has 533 places, 963 transitions, 24518 flow. Second operand 33 states and 343 transitions. [2024-11-28 03:08:46,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1358 transitions, 35914 flow