./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC --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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:21:27,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:21:27,297 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 18:21:27,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:21:27,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:21:27,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:21:27,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:21:27,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:21:27,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:21:27,327 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:21:27,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:21:27,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:21:27,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:21:27,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:21:27,328 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:21:27,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:21:27,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:21:27,328 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:21:27,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:21:27,330 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:21:27,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:21:27,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:21:27,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:21:27,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:21:27,331 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_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC 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 -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2024-11-23 18:21:27,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:21:27,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:21:27,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:21:27,610 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:21:27,611 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:21:27,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-23 18:21:30,705 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/data/b60a8a79f/19b9d77d43e94b13a8660fc634e4f386/FLAG7f00c9b2c [2024-11-23 18:21:31,036 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:21:31,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-23 18:21:31,049 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/data/b60a8a79f/19b9d77d43e94b13a8660fc634e4f386/FLAG7f00c9b2c [2024-11-23 18:21:31,295 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/data/b60a8a79f/19b9d77d43e94b13a8660fc634e4f386 [2024-11-23 18:21:31,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:21:31,300 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:21:31,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:21:31,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:21:31,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:21:31,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eba1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31, skipping insertion in model container [2024-11-23 18:21:31,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,330 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:21:31,637 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_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-23 18:21:31,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:21:31,656 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:21:31,677 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_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2368,2381] [2024-11-23 18:21:31,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:21:31,704 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:21:31,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31 WrapperNode [2024-11-23 18:21:31,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:21:31,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:21:31,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:21:31,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:21:31,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,751 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 180 [2024-11-23 18:21:31,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:21:31,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:21:31,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:21:31,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:21:31,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,797 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2024-11-23 18:21:31,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,815 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:21:31,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:21:31,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:21:31,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:21:31,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (1/1) ... [2024-11-23 18:21:31,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:21:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:31,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:21:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:21:31,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:21:31,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:21:31,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 18:21:31,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:21:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:21:31,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:21:31,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:21:31,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:21:31,906 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:21:32,046 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:21:32,049 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:21:32,498 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:21:32,498 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:21:32,943 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:21:32,943 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:21:32,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:21:32 BoogieIcfgContainer [2024-11-23 18:21:32,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:21:32,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:21:32,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:21:32,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:21:32,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:21:31" (1/3) ... [2024-11-23 18:21:32,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bd5d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:21:32, skipping insertion in model container [2024-11-23 18:21:32,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:21:31" (2/3) ... [2024-11-23 18:21:32,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bd5d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:21:32, skipping insertion in model container [2024-11-23 18:21:32,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:21:32" (3/3) ... [2024-11-23 18:21:32,958 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2024-11-23 18:21:32,975 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:21:32,977 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 28 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 18:21:32,977 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:21:33,044 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 18:21:33,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2024-11-23 18:21:33,133 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-23 18:21:33,136 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 18:21:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-23 18:21:33,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2024-11-23 18:21:33,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2024-11-23 18:21:33,159 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:21:33,172 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;@7a372211, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:21:33,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 18:21:33,193 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:21:33,193 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-23 18:21:33,193 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 18:21:33,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:33,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:33,194 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:33,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2003546243, now seen corresponding path program 1 times [2024-11-23 18:21:33,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:33,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375001772] [2024-11-23 18:21:33,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:33,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:33,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375001772] [2024-11-23 18:21:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375001772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:33,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:21:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169376826] [2024-11-23 18:21:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:33,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:21:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:33,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:21:33,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:21:33,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:21:33,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:33,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:33,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:21:33,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:34,193 INFO L124 PetriNetUnfolderBase]: 817/1179 cut-off events. [2024-11-23 18:21:34,193 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-23 18:21:34,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1179 events. 817/1179 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4411 event pairs, 226 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2024-11-23 18:21:34,211 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-11-23 18:21:34,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 215 flow [2024-11-23 18:21:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:21:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:21:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-23 18:21:34,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-11-23 18:21:34,229 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 58 transitions. [2024-11-23 18:21:34,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 215 flow [2024-11-23 18:21:34,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 18:21:34,245 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2024-11-23 18:21:34,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-11-23 18:21:34,251 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-11-23 18:21:34,251 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2024-11-23 18:21:34,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:34,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:34,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:34,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:21:34,252 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:34,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash -701610755, now seen corresponding path program 1 times [2024-11-23 18:21:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800194508] [2024-11-23 18:21:34,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:34,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:34,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800194508] [2024-11-23 18:21:34,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800194508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:34,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:21:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774879732] [2024-11-23 18:21:34,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:34,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:21:34,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:34,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:21:34,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:21:34,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:34,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:34,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:34,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:34,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:35,049 INFO L124 PetriNetUnfolderBase]: 1270/1951 cut-off events. [2024-11-23 18:21:35,050 INFO L125 PetriNetUnfolderBase]: For 157/172 co-relation queries the response was YES. [2024-11-23 18:21:35,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 1951 events. 1270/1951 cut-off events. For 157/172 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9026 event pairs, 776 based on Foata normal form. 117/1794 useless extension candidates. Maximal degree in co-relation 1532. Up to 981 conditions per place. [2024-11-23 18:21:35,070 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 55 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-23 18:21:35,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 65 transitions, 286 flow [2024-11-23 18:21:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:21:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:21:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-23 18:21:35,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-23 18:21:35,074 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 5 states and 90 transitions. [2024-11-23 18:21:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 65 transitions, 286 flow [2024-11-23 18:21:35,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:35,078 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 120 flow [2024-11-23 18:21:35,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-23 18:21:35,079 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2024-11-23 18:21:35,080 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 120 flow [2024-11-23 18:21:35,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:35,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:35,080 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:35,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:21:35,082 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:35,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash -157112489, now seen corresponding path program 1 times [2024-11-23 18:21:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616752695] [2024-11-23 18:21:35,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616752695] [2024-11-23 18:21:35,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616752695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067275597] [2024-11-23 18:21:35,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:35,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:35,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:21:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:35,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:35,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:35,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067275597] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:35,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:35,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-23 18:21:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640080292] [2024-11-23 18:21:35,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:35,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:21:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:35,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:21:35,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:21:35,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:35,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:35,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:35,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:36,481 INFO L124 PetriNetUnfolderBase]: 1546/2420 cut-off events. [2024-11-23 18:21:36,482 INFO L125 PetriNetUnfolderBase]: For 1238/1238 co-relation queries the response was YES. [2024-11-23 18:21:36,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5791 conditions, 2420 events. 1546/2420 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11912 event pairs, 555 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 3561. Up to 634 conditions per place. [2024-11-23 18:21:36,499 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 96 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-11-23 18:21:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 119 transitions, 609 flow [2024-11-23 18:21:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:21:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:21:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-11-23 18:21:36,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5451612903225806 [2024-11-23 18:21:36,503 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 120 flow. Second operand 10 states and 169 transitions. [2024-11-23 18:21:36,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 119 transitions, 609 flow [2024-11-23 18:21:36,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 119 transitions, 605 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:36,509 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 225 flow [2024-11-23 18:21:36,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-23 18:21:36,511 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-11-23 18:21:36,511 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 225 flow [2024-11-23 18:21:36,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:36,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:36,511 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:36,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:36,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:36,715 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:36,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 882206161, now seen corresponding path program 2 times [2024-11-23 18:21:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:36,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916770669] [2024-11-23 18:21:36,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:36,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:36,742 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:36,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:36,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916770669] [2024-11-23 18:21:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916770669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069127110] [2024-11-23 18:21:36,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:36,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:21:37,085 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:37,086 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:37,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:37,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:37,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069127110] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:37,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:37,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-23 18:21:37,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526180316] [2024-11-23 18:21:37,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:37,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:21:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:37,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:21:37,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:21:37,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:37,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:37,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:38,041 INFO L124 PetriNetUnfolderBase]: 1822/2822 cut-off events. [2024-11-23 18:21:38,041 INFO L125 PetriNetUnfolderBase]: For 3357/3357 co-relation queries the response was YES. [2024-11-23 18:21:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8553 conditions, 2822 events. 1822/2822 cut-off events. For 3357/3357 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13960 event pairs, 488 based on Foata normal form. 12/2820 useless extension candidates. Maximal degree in co-relation 5994. Up to 520 conditions per place. [2024-11-23 18:21:38,062 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-11-23 18:21:38,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 148 transitions, 935 flow [2024-11-23 18:21:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:21:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:21:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-11-23 18:21:38,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2024-11-23 18:21:38,064 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 225 flow. Second operand 12 states and 190 transitions. [2024-11-23 18:21:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 148 transitions, 935 flow [2024-11-23 18:21:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 148 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:38,087 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 491 flow [2024-11-23 18:21:38,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=491, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-23 18:21:38,088 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2024-11-23 18:21:38,088 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 491 flow [2024-11-23 18:21:38,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:38,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:38,088 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:38,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:38,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:38,290 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:38,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash 342040991, now seen corresponding path program 3 times [2024-11-23 18:21:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592598253] [2024-11-23 18:21:38,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:21:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:38,310 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:21:38,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:38,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:38,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592598253] [2024-11-23 18:21:38,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592598253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:38,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432975553] [2024-11-23 18:21:38,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:21:38,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:38,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:38,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:38,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:21:38,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:21:38,572 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:38,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:38,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:38,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:38,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432975553] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:38,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-23 18:21:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885550969] [2024-11-23 18:21:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:38,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:21:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:38,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:21:38,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:21:38,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:38,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:38,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:38,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:38,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:39,642 INFO L124 PetriNetUnfolderBase]: 2231/3463 cut-off events. [2024-11-23 18:21:39,643 INFO L125 PetriNetUnfolderBase]: For 8994/8994 co-relation queries the response was YES. [2024-11-23 18:21:39,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13046 conditions, 3463 events. 2231/3463 cut-off events. For 8994/8994 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17817 event pairs, 675 based on Foata normal form. 14/3459 useless extension candidates. Maximal degree in co-relation 10753. Up to 946 conditions per place. [2024-11-23 18:21:39,675 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-11-23 18:21:39,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 170 transitions, 1333 flow [2024-11-23 18:21:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 18:21:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 18:21:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-11-23 18:21:39,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5601173020527859 [2024-11-23 18:21:39,681 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 491 flow. Second operand 11 states and 191 transitions. [2024-11-23 18:21:39,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 170 transitions, 1333 flow [2024-11-23 18:21:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 170 transitions, 1284 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-23 18:21:39,745 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 857 flow [2024-11-23 18:21:39,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=857, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2024-11-23 18:21:39,748 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-11-23 18:21:39,748 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 857 flow [2024-11-23 18:21:39,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:39,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:39,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:39,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:39,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:39,950 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:39,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:39,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2084057715, now seen corresponding path program 4 times [2024-11-23 18:21:39,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:39,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098154154] [2024-11-23 18:21:39,951 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:21:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:39,975 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:21:39,975 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:40,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:40,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098154154] [2024-11-23 18:21:40,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098154154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:40,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201084572] [2024-11-23 18:21:40,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:21:40,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:40,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:40,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:21:40,190 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:21:40,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:40,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:40,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:40,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:40,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201084572] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:40,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:40,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-23 18:21:40,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37424852] [2024-11-23 18:21:40,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:40,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:21:40,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:40,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:21:40,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:21:40,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:40,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:40,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:40,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:40,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:41,309 INFO L124 PetriNetUnfolderBase]: 2279/3549 cut-off events. [2024-11-23 18:21:41,309 INFO L125 PetriNetUnfolderBase]: For 14246/14246 co-relation queries the response was YES. [2024-11-23 18:21:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 3549 events. 2279/3549 cut-off events. For 14246/14246 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18512 event pairs, 614 based on Foata normal form. 14/3545 useless extension candidates. Maximal degree in co-relation 12334. Up to 763 conditions per place. [2024-11-23 18:21:41,422 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-11-23 18:21:41,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 166 transitions, 1541 flow [2024-11-23 18:21:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:21:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:21:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-11-23 18:21:41,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5612903225806452 [2024-11-23 18:21:41,429 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 857 flow. Second operand 10 states and 174 transitions. [2024-11-23 18:21:41,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 166 transitions, 1541 flow [2024-11-23 18:21:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 166 transitions, 1472 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-23 18:21:41,547 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1056 flow [2024-11-23 18:21:41,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1056, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-11-23 18:21:41,548 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-11-23 18:21:41,549 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1056 flow [2024-11-23 18:21:41,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:41,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:41,549 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:41,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:41,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 18:21:41,750 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:41,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 443032481, now seen corresponding path program 5 times [2024-11-23 18:21:41,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:41,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243950579] [2024-11-23 18:21:41,751 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:21:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:41,770 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:41,771 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243950579] [2024-11-23 18:21:41,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243950579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505611686] [2024-11-23 18:21:41,906 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:21:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:41,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:21:41,996 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:41,997 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:41,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:21:41,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:42,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:42,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505611686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:42,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:21:42,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-23 18:21:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225560309] [2024-11-23 18:21:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:42,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 18:21:42,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:42,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 18:21:42,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:21:42,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:42,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1056 flow. Second operand has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:42,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:42,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:42,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:43,916 INFO L124 PetriNetUnfolderBase]: 2673/4122 cut-off events. [2024-11-23 18:21:43,916 INFO L125 PetriNetUnfolderBase]: For 20429/20433 co-relation queries the response was YES. [2024-11-23 18:21:43,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18560 conditions, 4122 events. 2673/4122 cut-off events. For 20429/20433 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22453 event pairs, 402 based on Foata normal form. 16/4116 useless extension candidates. Maximal degree in co-relation 16074. Up to 772 conditions per place. [2024-11-23 18:21:44,019 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 176 selfloop transitions, 166 changer transitions 0/347 dead transitions. [2024-11-23 18:21:44,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 347 transitions, 3732 flow [2024-11-23 18:21:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-23 18:21:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-23 18:21:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 398 transitions. [2024-11-23 18:21:44,021 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4755077658303465 [2024-11-23 18:21:44,022 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1056 flow. Second operand 27 states and 398 transitions. [2024-11-23 18:21:44,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 347 transitions, 3732 flow [2024-11-23 18:21:44,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 347 transitions, 3631 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-23 18:21:44,124 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2765 flow [2024-11-23 18:21:44,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2765, PETRI_PLACES=121, PETRI_TRANSITIONS=217} [2024-11-23 18:21:44,125 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2024-11-23 18:21:44,126 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2765 flow [2024-11-23 18:21:44,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:44,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:44,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:44,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:21:44,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 18:21:44,327 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:44,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1052367671, now seen corresponding path program 6 times [2024-11-23 18:21:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355074764] [2024-11-23 18:21:44,328 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:21:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:44,350 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:21:44,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355074764] [2024-11-23 18:21:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355074764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777682312] [2024-11-23 18:21:44,515 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:21:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:44,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:44,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:44,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:21:44,613 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:21:44,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:44,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:44,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:44,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:44,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777682312] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:44,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:44,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-23 18:21:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428055576] [2024-11-23 18:21:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:44,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:21:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:44,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:21:44,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:21:44,837 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:44,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 217 transitions, 2765 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:44,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:44,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:44,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:45,984 INFO L124 PetriNetUnfolderBase]: 2663/4106 cut-off events. [2024-11-23 18:21:45,985 INFO L125 PetriNetUnfolderBase]: For 30112/30122 co-relation queries the response was YES. [2024-11-23 18:21:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21095 conditions, 4106 events. 2663/4106 cut-off events. For 30112/30122 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21915 event pairs, 451 based on Foata normal form. 22/4107 useless extension candidates. Maximal degree in co-relation 19227. Up to 762 conditions per place. [2024-11-23 18:21:46,032 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 157 selfloop transitions, 135 changer transitions 0/297 dead transitions. [2024-11-23 18:21:46,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 297 transitions, 3780 flow [2024-11-23 18:21:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:21:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:21:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-11-23 18:21:46,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2024-11-23 18:21:46,034 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2765 flow. Second operand 12 states and 195 transitions. [2024-11-23 18:21:46,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 297 transitions, 3780 flow [2024-11-23 18:21:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 297 transitions, 3640 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-11-23 18:21:46,249 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3134 flow [2024-11-23 18:21:46,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3134, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2024-11-23 18:21:46,252 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2024-11-23 18:21:46,252 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3134 flow [2024-11-23 18:21:46,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:46,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:46,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:46,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:21:46,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-23 18:21:46,453 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:46,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2037726802, now seen corresponding path program 1 times [2024-11-23 18:21:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:46,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029780978] [2024-11-23 18:21:46,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:46,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:46,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029780978] [2024-11-23 18:21:46,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029780978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:46,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:46,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:21:46,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111742670] [2024-11-23 18:21:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:46,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:21:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:46,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:21:46,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:21:46,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:46,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 3134 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:46,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:46,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:46,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:47,204 INFO L124 PetriNetUnfolderBase]: 2277/3491 cut-off events. [2024-11-23 18:21:47,205 INFO L125 PetriNetUnfolderBase]: For 37444/37444 co-relation queries the response was YES. [2024-11-23 18:21:47,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19875 conditions, 3491 events. 2277/3491 cut-off events. For 37444/37444 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17908 event pairs, 838 based on Foata normal form. 69/3522 useless extension candidates. Maximal degree in co-relation 18259. Up to 2664 conditions per place. [2024-11-23 18:21:47,240 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 215 selfloop transitions, 7 changer transitions 0/227 dead transitions. [2024-11-23 18:21:47,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 227 transitions, 3549 flow [2024-11-23 18:21:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:21:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:21:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-23 18:21:47,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-23 18:21:47,241 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3134 flow. Second operand 5 states and 85 transitions. [2024-11-23 18:21:47,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 227 transitions, 3549 flow [2024-11-23 18:21:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 227 transitions, 3424 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-23 18:21:47,426 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2870 flow [2024-11-23 18:21:47,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2870, PETRI_PLACES=122, PETRI_TRANSITIONS=201} [2024-11-23 18:21:47,427 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-11-23 18:21:47,427 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2870 flow [2024-11-23 18:21:47,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:47,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:47,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:47,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:21:47,428 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:47,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1968602648, now seen corresponding path program 1 times [2024-11-23 18:21:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:47,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278677780] [2024-11-23 18:21:47,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278677780] [2024-11-23 18:21:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278677780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:47,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:47,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:21:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590054532] [2024-11-23 18:21:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:47,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:21:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:47,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:21:47,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:21:47,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 201 transitions, 2870 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:47,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:47,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:47,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:48,214 INFO L124 PetriNetUnfolderBase]: 2069/3143 cut-off events. [2024-11-23 18:21:48,214 INFO L125 PetriNetUnfolderBase]: For 34035/34035 co-relation queries the response was YES. [2024-11-23 18:21:48,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18204 conditions, 3143 events. 2069/3143 cut-off events. For 34035/34035 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15299 event pairs, 773 based on Foata normal form. 22/3127 useless extension candidates. Maximal degree in co-relation 17448. Up to 2664 conditions per place. [2024-11-23 18:21:48,252 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 179 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2024-11-23 18:21:48,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3286 flow [2024-11-23 18:21:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:21:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:21:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-23 18:21:48,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2024-11-23 18:21:48,255 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2870 flow. Second operand 5 states and 79 transitions. [2024-11-23 18:21:48,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3286 flow [2024-11-23 18:21:48,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3149 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-11-23 18:21:48,438 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2024-11-23 18:21:48,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2651, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2024-11-23 18:21:48,439 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-11-23 18:21:48,439 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2024-11-23 18:21:48,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:48,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:48,440 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:48,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 18:21:48,440 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:48,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 117467052, now seen corresponding path program 1 times [2024-11-23 18:21:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:48,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833420196] [2024-11-23 18:21:48,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:48,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:48,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833420196] [2024-11-23 18:21:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833420196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908484652] [2024-11-23 18:21:48,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:48,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:48,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:48,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:21:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:48,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:21:48,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:48,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:21:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908484652] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:48,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:48,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-23 18:21:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123738501] [2024-11-23 18:21:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:48,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:21:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:48,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:21:48,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:21:48,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:21:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2651 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-11-23 18:21:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:48,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:21:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:49,219 INFO L124 PetriNetUnfolderBase]: 2084/3100 cut-off events. [2024-11-23 18:21:49,219 INFO L125 PetriNetUnfolderBase]: For 31983/31995 co-relation queries the response was YES. [2024-11-23 18:21:49,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 3100 events. 2084/3100 cut-off events. For 31983/31995 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14964 event pairs, 449 based on Foata normal form. 168/3167 useless extension candidates. Maximal degree in co-relation 17933. Up to 2267 conditions per place. [2024-11-23 18:21:49,251 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 259 selfloop transitions, 13 changer transitions 0/277 dead transitions. [2024-11-23 18:21:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 277 transitions, 4606 flow [2024-11-23 18:21:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:21:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:21:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-23 18:21:49,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-23 18:21:49,254 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 70 transitions. [2024-11-23 18:21:49,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 277 transitions, 4606 flow [2024-11-23 18:21:49,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 277 transitions, 4519 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-11-23 18:21:49,432 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2024-11-23 18:21:49,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2024-11-23 18:21:49,433 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2024-11-23 18:21:49,433 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2024-11-23 18:21:49,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-11-23 18:21:49,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:49,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:49,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:21:49,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 18:21:49,634 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:49,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1306100268, now seen corresponding path program 1 times [2024-11-23 18:21:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558233129] [2024-11-23 18:21:49,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558233129] [2024-11-23 18:21:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558233129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003749910] [2024-11-23 18:21:50,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:50,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:50,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:21:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:50,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 18:21:50,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:50,639 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 [2024-11-23 18:21:50,920 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 15 treesize of output 7 [2024-11-23 18:21:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:50,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:51,388 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 33 treesize of output 29 [2024-11-23 18:21:51,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:51,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-23 18:21:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:51,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003749910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:51,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:21:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-23 18:21:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246544718] [2024-11-23 18:21:51,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:51,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 18:21:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:51,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 18:21:51,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-23 18:21:51,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:21:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:21:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:53,485 INFO L124 PetriNetUnfolderBase]: 4393/6244 cut-off events. [2024-11-23 18:21:53,485 INFO L125 PetriNetUnfolderBase]: For 47552/47552 co-relation queries the response was YES. [2024-11-23 18:21:53,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 6244 events. 4393/6244 cut-off events. For 47552/47552 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29688 event pairs, 327 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 29315. Up to 3993 conditions per place. [2024-11-23 18:21:53,631 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 597 selfloop transitions, 102 changer transitions 2/702 dead transitions. [2024-11-23 18:21:53,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 10479 flow [2024-11-23 18:21:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:21:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:21:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-11-23 18:21:53,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-11-23 18:21:53,633 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 14 states and 218 transitions. [2024-11-23 18:21:53,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 10479 flow [2024-11-23 18:21:54,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 702 transitions, 10441 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-23 18:21:54,033 INFO L231 Difference]: Finished difference. Result has 125 places, 285 transitions, 4291 flow [2024-11-23 18:21:54,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4291, PETRI_PLACES=125, PETRI_TRANSITIONS=285} [2024-11-23 18:21:54,034 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-11-23 18:21:54,034 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 285 transitions, 4291 flow [2024-11-23 18:21:54,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:54,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:54,035 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:54,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:54,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-23 18:21:54,239 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:54,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1054631312, now seen corresponding path program 2 times [2024-11-23 18:21:54,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:54,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321270581] [2024-11-23 18:21:54,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:54,278 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:54,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:21:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321270581] [2024-11-23 18:21:54,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321270581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:21:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761481363] [2024-11-23 18:21:54,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:54,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:54,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:21:55,043 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:55,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:55,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-23 18:21:55,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:55,094 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 [2024-11-23 18:21:55,430 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 15 treesize of output 7 [2024-11-23 18:21:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:55,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:55,835 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 33 treesize of output 29 [2024-11-23 18:21:55,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:55,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-23 18:21:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:55,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761481363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:55,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:21:55,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-23 18:21:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630260032] [2024-11-23 18:21:55,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:55,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 18:21:55,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:21:55,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 18:21:55,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-23 18:21:55,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:21:55,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 285 transitions, 4291 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:55,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:55,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:21:55,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:58,732 INFO L124 PetriNetUnfolderBase]: 5739/8164 cut-off events. [2024-11-23 18:21:58,732 INFO L125 PetriNetUnfolderBase]: For 70020/70020 co-relation queries the response was YES. [2024-11-23 18:21:58,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47533 conditions, 8164 events. 5739/8164 cut-off events. For 70020/70020 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40430 event pairs, 569 based on Foata normal form. 3/8167 useless extension candidates. Maximal degree in co-relation 44347. Up to 6128 conditions per place. [2024-11-23 18:21:58,814 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 601 selfloop transitions, 237 changer transitions 2/841 dead transitions. [2024-11-23 18:21:58,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 841 transitions, 12696 flow [2024-11-23 18:21:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 18:21:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-23 18:21:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 413 transitions. [2024-11-23 18:21:58,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37007168458781364 [2024-11-23 18:21:58,818 INFO L175 Difference]: Start difference. First operand has 125 places, 285 transitions, 4291 flow. Second operand 36 states and 413 transitions. [2024-11-23 18:21:58,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 841 transitions, 12696 flow [2024-11-23 18:21:59,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 841 transitions, 12624 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:59,374 INFO L231 Difference]: Finished difference. Result has 177 places, 522 transitions, 8518 flow [2024-11-23 18:21:59,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8518, PETRI_PLACES=177, PETRI_TRANSITIONS=522} [2024-11-23 18:21:59,374 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 144 predicate places. [2024-11-23 18:21:59,374 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 522 transitions, 8518 flow [2024-11-23 18:21:59,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:59,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:59,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:59,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:21:59,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:59,576 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:21:59,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1589968352, now seen corresponding path program 1 times [2024-11-23 18:21:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:21:59,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371412298] [2024-11-23 18:21:59,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:21:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:22:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371412298] [2024-11-23 18:22:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371412298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201591411] [2024-11-23 18:22:00,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:22:00,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:00,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:00,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:22:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:22:00,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 18:22:00,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:00,288 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 15 treesize of output 7 [2024-11-23 18:22:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:00,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:00,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:22:00,396 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 19 treesize of output 16 [2024-11-23 18:22:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201591411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:00,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:00,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 18 [2024-11-23 18:22:00,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332275690] [2024-11-23 18:22:00,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:00,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 18:22:00,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:00,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 18:22:00,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-23 18:22:00,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:00,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 522 transitions, 8518 flow. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 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) [2024-11-23 18:22:00,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:00,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:00,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:03,051 INFO L124 PetriNetUnfolderBase]: 7678/10922 cut-off events. [2024-11-23 18:22:03,051 INFO L125 PetriNetUnfolderBase]: For 105336/105336 co-relation queries the response was YES. [2024-11-23 18:22:03,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68765 conditions, 10922 events. 7678/10922 cut-off events. For 105336/105336 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 57388 event pairs, 391 based on Foata normal form. 2/10924 useless extension candidates. Maximal degree in co-relation 68157. Up to 6802 conditions per place. [2024-11-23 18:22:03,170 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 643 selfloop transitions, 280 changer transitions 1/925 dead transitions. [2024-11-23 18:22:03,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 925 transitions, 16078 flow [2024-11-23 18:22:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:22:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:22:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 204 transitions. [2024-11-23 18:22:03,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-11-23 18:22:03,172 INFO L175 Difference]: Start difference. First operand has 177 places, 522 transitions, 8518 flow. Second operand 14 states and 204 transitions. [2024-11-23 18:22:03,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 925 transitions, 16078 flow [2024-11-23 18:22:04,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 925 transitions, 15491 flow, removed 265 selfloop flow, removed 4 redundant places. [2024-11-23 18:22:04,494 INFO L231 Difference]: Finished difference. Result has 193 places, 664 transitions, 10893 flow [2024-11-23 18:22:04,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10893, PETRI_PLACES=193, PETRI_TRANSITIONS=664} [2024-11-23 18:22:04,494 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 160 predicate places. [2024-11-23 18:22:04,495 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 664 transitions, 10893 flow [2024-11-23 18:22:04,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 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) [2024-11-23 18:22:04,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:04,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:04,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 18:22:04,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:04,696 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:04,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash 480043738, now seen corresponding path program 3 times [2024-11-23 18:22:04,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070221070] [2024-11-23 18:22:04,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:22:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:04,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:22:04,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:05,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070221070] [2024-11-23 18:22:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070221070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445617974] [2024-11-23 18:22:05,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:22:05,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:05,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:05,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:22:05,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:22:05,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:05,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 18:22:05,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:05,366 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 [2024-11-23 18:22:05,548 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 15 treesize of output 7 [2024-11-23 18:22:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:05,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:05,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445617974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:05,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:05,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2024-11-23 18:22:05,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093713829] [2024-11-23 18:22:05,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:05,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 18:22:05,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:05,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 18:22:05,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-11-23 18:22:05,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 664 transitions, 10893 flow. Second operand has 20 states, 20 states have (on average 6.3) internal successors, (126), 20 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) [2024-11-23 18:22:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:09,467 INFO L124 PetriNetUnfolderBase]: 9200/13155 cut-off events. [2024-11-23 18:22:09,467 INFO L125 PetriNetUnfolderBase]: For 140712/140712 co-relation queries the response was YES. [2024-11-23 18:22:09,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87052 conditions, 13155 events. 9200/13155 cut-off events. For 140712/140712 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 72084 event pairs, 759 based on Foata normal form. 1/13156 useless extension candidates. Maximal degree in co-relation 86400. Up to 10624 conditions per place. [2024-11-23 18:22:09,628 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 709 selfloop transitions, 299 changer transitions 1/1010 dead transitions. [2024-11-23 18:22:09,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1010 transitions, 17436 flow [2024-11-23 18:22:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 18:22:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-23 18:22:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 200 transitions. [2024-11-23 18:22:09,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-23 18:22:09,630 INFO L175 Difference]: Start difference. First operand has 193 places, 664 transitions, 10893 flow. Second operand 16 states and 200 transitions. [2024-11-23 18:22:09,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1010 transitions, 17436 flow [2024-11-23 18:22:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1010 transitions, 17333 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-11-23 18:22:11,338 INFO L231 Difference]: Finished difference. Result has 212 places, 826 transitions, 13714 flow [2024-11-23 18:22:11,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13714, PETRI_PLACES=212, PETRI_TRANSITIONS=826} [2024-11-23 18:22:11,338 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 179 predicate places. [2024-11-23 18:22:11,338 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 826 transitions, 13714 flow [2024-11-23 18:22:11,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.3) internal successors, (126), 20 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) [2024-11-23 18:22:11,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:11,339 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:11,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:22:11,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 18:22:11,539 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:11,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash 456715202, now seen corresponding path program 2 times [2024-11-23 18:22:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966434061] [2024-11-23 18:22:11,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:22:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:11,556 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:22:11,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:11,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:11,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966434061] [2024-11-23 18:22:11,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966434061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:11,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328503915] [2024-11-23 18:22:11,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:22:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:11,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:11,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:11,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:22:11,948 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:22:11,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:11,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 18:22:11,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:12,052 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 15 treesize of output 7 [2024-11-23 18:22:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:12,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:12,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:22:12,116 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 23 treesize of output 16 [2024-11-23 18:22:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328503915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:12,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:12,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 14 [2024-11-23 18:22:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908087972] [2024-11-23 18:22:12,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:12,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:22:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:12,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:22:12,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:22:12,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:12,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 826 transitions, 13714 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:12,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:12,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:12,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:16,335 INFO L124 PetriNetUnfolderBase]: 10986/15702 cut-off events. [2024-11-23 18:22:16,336 INFO L125 PetriNetUnfolderBase]: For 184464/184464 co-relation queries the response was YES. [2024-11-23 18:22:16,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110794 conditions, 15702 events. 10986/15702 cut-off events. For 184464/184464 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 88672 event pairs, 1054 based on Foata normal form. 2/15704 useless extension candidates. Maximal degree in co-relation 110340. Up to 12505 conditions per place. [2024-11-23 18:22:16,519 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 841 selfloop transitions, 317 changer transitions 1/1160 dead transitions. [2024-11-23 18:22:16,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1160 transitions, 21122 flow [2024-11-23 18:22:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:22:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:22:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-11-23 18:22:16,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-23 18:22:16,520 INFO L175 Difference]: Start difference. First operand has 212 places, 826 transitions, 13714 flow. Second operand 12 states and 180 transitions. [2024-11-23 18:22:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1160 transitions, 21122 flow [2024-11-23 18:22:18,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1160 transitions, 20943 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-11-23 18:22:18,767 INFO L231 Difference]: Finished difference. Result has 225 places, 938 transitions, 16278 flow [2024-11-23 18:22:18,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13541, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16278, PETRI_PLACES=225, PETRI_TRANSITIONS=938} [2024-11-23 18:22:18,768 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 192 predicate places. [2024-11-23 18:22:18,768 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 938 transitions, 16278 flow [2024-11-23 18:22:18,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:18,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:18,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:18,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 18:22:18,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 18:22:18,969 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:18,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash -429083078, now seen corresponding path program 3 times [2024-11-23 18:22:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457683271] [2024-11-23 18:22:18,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:22:18,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:18,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 18:22:18,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457683271] [2024-11-23 18:22:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457683271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689273297] [2024-11-23 18:22:19,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:22:19,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:19,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:22:19,362 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 18:22:19,363 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:19,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 18:22:19,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:19,493 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 15 treesize of output 7 [2024-11-23 18:22:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:19,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:19,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:22:19,563 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 23 treesize of output 16 [2024-11-23 18:22:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689273297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:19,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2024-11-23 18:22:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785308787] [2024-11-23 18:22:19,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:19,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:22:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:19,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:22:19,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:22:19,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:19,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 938 transitions, 16278 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:19,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:19,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:19,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:24,894 INFO L124 PetriNetUnfolderBase]: 11760/16806 cut-off events. [2024-11-23 18:22:24,895 INFO L125 PetriNetUnfolderBase]: For 216764/216764 co-relation queries the response was YES. [2024-11-23 18:22:25,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123115 conditions, 16806 events. 11760/16806 cut-off events. For 216764/216764 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 95908 event pairs, 1235 based on Foata normal form. 2/16808 useless extension candidates. Maximal degree in co-relation 122713. Up to 14640 conditions per place. [2024-11-23 18:22:25,097 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 879 selfloop transitions, 265 changer transitions 1/1146 dead transitions. [2024-11-23 18:22:25,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1146 transitions, 21646 flow [2024-11-23 18:22:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 18:22:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-23 18:22:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 190 transitions. [2024-11-23 18:22:25,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47146401985111663 [2024-11-23 18:22:25,099 INFO L175 Difference]: Start difference. First operand has 225 places, 938 transitions, 16278 flow. Second operand 13 states and 190 transitions. [2024-11-23 18:22:25,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1146 transitions, 21646 flow [2024-11-23 18:22:27,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1146 transitions, 21234 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-11-23 18:22:27,685 INFO L231 Difference]: Finished difference. Result has 236 places, 967 transitions, 17008 flow [2024-11-23 18:22:27,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=15866, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17008, PETRI_PLACES=236, PETRI_TRANSITIONS=967} [2024-11-23 18:22:27,686 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 203 predicate places. [2024-11-23 18:22:27,686 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 967 transitions, 17008 flow [2024-11-23 18:22:27,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:27,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:27,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:27,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:22:27,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 18:22:27,887 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:27,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1715664764, now seen corresponding path program 4 times [2024-11-23 18:22:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738816213] [2024-11-23 18:22:27,888 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:22:27,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:27,905 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:22:27,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738816213] [2024-11-23 18:22:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738816213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824616184] [2024-11-23 18:22:28,366 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:22:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:28,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:28,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:22:28,459 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:22:28,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:28,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 18:22:28,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:28,489 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 [2024-11-23 18:22:28,742 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 15 treesize of output 7 [2024-11-23 18:22:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:28,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824616184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:29,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:29,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2024-11-23 18:22:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882102675] [2024-11-23 18:22:29,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:29,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-23 18:22:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:29,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-23 18:22:29,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-23 18:22:29,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:29,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 967 transitions, 17008 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:29,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:29,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:29,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:36,550 INFO L124 PetriNetUnfolderBase]: 13014/18588 cut-off events. [2024-11-23 18:22:36,550 INFO L125 PetriNetUnfolderBase]: For 255944/255944 co-relation queries the response was YES. [2024-11-23 18:22:36,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139702 conditions, 18588 events. 13014/18588 cut-off events. For 255944/255944 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 107695 event pairs, 1053 based on Foata normal form. 2/18590 useless extension candidates. Maximal degree in co-relation 139293. Up to 14523 conditions per place. [2024-11-23 18:22:36,776 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 908 selfloop transitions, 510 changer transitions 1/1420 dead transitions. [2024-11-23 18:22:36,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1420 transitions, 27060 flow [2024-11-23 18:22:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 18:22:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-23 18:22:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 385 transitions. [2024-11-23 18:22:36,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3449820788530466 [2024-11-23 18:22:36,778 INFO L175 Difference]: Start difference. First operand has 236 places, 967 transitions, 17008 flow. Second operand 36 states and 385 transitions. [2024-11-23 18:22:36,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1420 transitions, 27060 flow [2024-11-23 18:22:40,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1420 transitions, 26586 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-11-23 18:22:40,074 INFO L231 Difference]: Finished difference. Result has 282 places, 1164 transitions, 21469 flow [2024-11-23 18:22:40,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16643, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21469, PETRI_PLACES=282, PETRI_TRANSITIONS=1164} [2024-11-23 18:22:40,075 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 249 predicate places. [2024-11-23 18:22:40,076 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 1164 transitions, 21469 flow [2024-11-23 18:22:40,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:40,076 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:40,076 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:40,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:22:40,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:22:40,277 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:40,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 102098030, now seen corresponding path program 5 times [2024-11-23 18:22:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254023052] [2024-11-23 18:22:40,278 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:22:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:40,295 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:22:40,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254023052] [2024-11-23 18:22:40,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254023052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81546080] [2024-11-23 18:22:40,577 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:22:40,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:40,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:40,579 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:40,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:22:40,671 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:22:40,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:40,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 18:22:40,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:40,713 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 [2024-11-23 18:22:40,995 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 15 treesize of output 7 [2024-11-23 18:22:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:41,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:41,410 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 33 treesize of output 29 [2024-11-23 18:22:41,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:22:41,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-23 18:22:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81546080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:41,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:41,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-23 18:22:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580653142] [2024-11-23 18:22:41,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:41,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 18:22:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:41,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 18:22:41,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-11-23 18:22:41,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 1164 transitions, 21469 flow. Second operand has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 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) [2024-11-23 18:22:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:22:49,270 INFO L124 PetriNetUnfolderBase]: 15275/21808 cut-off events. [2024-11-23 18:22:49,270 INFO L125 PetriNetUnfolderBase]: For 344712/344712 co-relation queries the response was YES. [2024-11-23 18:22:49,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175556 conditions, 21808 events. 15275/21808 cut-off events. For 344712/344712 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 129305 event pairs, 1684 based on Foata normal form. 2/21810 useless extension candidates. Maximal degree in co-relation 175105. Up to 18327 conditions per place. [2024-11-23 18:22:49,836 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 1285 selfloop transitions, 315 changer transitions 1/1602 dead transitions. [2024-11-23 18:22:49,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1602 transitions, 32464 flow [2024-11-23 18:22:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:22:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:22:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 174 transitions. [2024-11-23 18:22:49,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-11-23 18:22:49,837 INFO L175 Difference]: Start difference. First operand has 282 places, 1164 transitions, 21469 flow. Second operand 12 states and 174 transitions. [2024-11-23 18:22:49,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1602 transitions, 32464 flow [2024-11-23 18:22:55,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1602 transitions, 31093 flow, removed 420 selfloop flow, removed 9 redundant places. [2024-11-23 18:22:55,310 INFO L231 Difference]: Finished difference. Result has 289 places, 1288 transitions, 23921 flow [2024-11-23 18:22:55,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=20520, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23921, PETRI_PLACES=289, PETRI_TRANSITIONS=1288} [2024-11-23 18:22:55,312 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 256 predicate places. [2024-11-23 18:22:55,312 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 1288 transitions, 23921 flow [2024-11-23 18:22:55,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 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) [2024-11-23 18:22:55,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:22:55,312 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:22:55,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-23 18:22:55,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:55,516 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:22:55,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:22:55,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2019493354, now seen corresponding path program 6 times [2024-11-23 18:22:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:22:55,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263346] [2024-11-23 18:22:55,517 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:22:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:22:55,545 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:22:55,545 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:22:56,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263346] [2024-11-23 18:22:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:22:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721801270] [2024-11-23 18:22:56,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:22:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:22:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:22:56,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:22:56,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:22:56,198 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:22:56,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:22:56,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 18:22:56,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:22:56,234 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 [2024-11-23 18:22:56,572 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 15 treesize of output 7 [2024-11-23 18:22:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:22:56,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:22:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:22:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721801270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:22:56,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:22:56,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2024-11-23 18:22:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156307598] [2024-11-23 18:22:56,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:22:56,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 18:22:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:22:56,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 18:22:56,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-23 18:22:56,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:22:56,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1288 transitions, 23921 flow. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:22:56,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:22:56,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:22:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:23:11,251 INFO L124 PetriNetUnfolderBase]: 21477/30808 cut-off events. [2024-11-23 18:23:11,251 INFO L125 PetriNetUnfolderBase]: For 504530/504530 co-relation queries the response was YES. [2024-11-23 18:23:11,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249414 conditions, 30808 events. 21477/30808 cut-off events. For 504530/504530 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 193288 event pairs, 1575 based on Foata normal form. 4/30812 useless extension candidates. Maximal degree in co-relation 248928. Up to 19773 conditions per place. [2024-11-23 18:23:12,008 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 1233 selfloop transitions, 1402 changer transitions 2/2638 dead transitions. [2024-11-23 18:23:12,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2638 transitions, 49870 flow [2024-11-23 18:23:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-23 18:23:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-11-23 18:23:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1058 transitions. [2024-11-23 18:23:12,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3379112104758863 [2024-11-23 18:23:12,253 INFO L175 Difference]: Start difference. First operand has 289 places, 1288 transitions, 23921 flow. Second operand 101 states and 1058 transitions. [2024-11-23 18:23:12,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2638 transitions, 49870 flow [2024-11-23 18:23:22,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 2638 transitions, 49153 flow, removed 282 selfloop flow, removed 4 redundant places. [2024-11-23 18:23:22,522 INFO L231 Difference]: Finished difference. Result has 411 places, 2198 transitions, 43052 flow [2024-11-23 18:23:22,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=23512, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=43052, PETRI_PLACES=411, PETRI_TRANSITIONS=2198} [2024-11-23 18:23:22,523 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 378 predicate places. [2024-11-23 18:23:22,523 INFO L471 AbstractCegarLoop]: Abstraction has has 411 places, 2198 transitions, 43052 flow [2024-11-23 18:23:22,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:23:22,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:23:22,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:23:22,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 18:23:22,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:23:22,728 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 18:23:22,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:23:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash -148486474, now seen corresponding path program 7 times [2024-11-23 18:23:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:23:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314241156] [2024-11-23 18:23:22,729 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:23:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:23:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:23:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:23:23,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:23:23,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314241156] [2024-11-23 18:23:23,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314241156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:23:23,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639347326] [2024-11-23 18:23:23,214 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:23:23,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:23:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:23:23,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:23:23,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe4c7aa5-25bf-4099-bb33-70bd51587a4d/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:23:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:23:23,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 18:23:23,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:23:23,348 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 [2024-11-23 18:23:23,571 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 15 treesize of output 7 [2024-11-23 18:23:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:23:23,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:23:23,897 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 33 treesize of output 29 [2024-11-23 18:23:23,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:23:23,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2024-11-23 18:23:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:23:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639347326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:23:24,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:23:24,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-23 18:23:24,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093527627] [2024-11-23 18:23:24,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:23:24,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 18:23:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:23:24,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 18:23:24,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-23 18:23:24,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-23 18:23:24,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 2198 transitions, 43052 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:23:24,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:23:24,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-23 18:23:24,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand