./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:42:54,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:42:54,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:42:54,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:42:54,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:42:54,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:42:54,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:42:54,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:42:54,626 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:42:54,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:42:54,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:42:54,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:42:54,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:42:54,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:42:54,630 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:42:54,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:42:54,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:42:54,631 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:42:54,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:42:54,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:42:54,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:42:54,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:42:54,632 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:42:54,632 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:42:54,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:42:54,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:42:54,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:42:54,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:42:54,634 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:42:54,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:42:54,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:42:54,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:42:54,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:42:54,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:42:54,636 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_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-11-28 03:42:55,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:42:55,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:42:55,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:42:55,027 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:42:55,028 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:42:55,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-28 03:42:58,209 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/data/07e3622eb/c2b442c3b39848f79a0dd07c56c96932/FLAG8f88f5ac4 [2024-11-28 03:42:58,671 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:42:58,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-28 03:42:58,689 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/data/07e3622eb/c2b442c3b39848f79a0dd07c56c96932/FLAG8f88f5ac4 [2024-11-28 03:42:58,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/data/07e3622eb/c2b442c3b39848f79a0dd07c56c96932 [2024-11-28 03:42:58,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:42:58,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:42:58,725 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:42:58,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:42:58,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:42:58,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:42:58" (1/1) ... [2024-11-28 03:42:58,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f1348e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:58, skipping insertion in model container [2024-11-28 03:42:58,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:42:58" (1/1) ... [2024-11-28 03:42:58,769 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:42:59,055 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_cb320c68-70bc-4563-83fa-d4385f325b3c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2776,2789] [2024-11-28 03:42:59,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:42:59,096 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:42:59,137 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_cb320c68-70bc-4563-83fa-d4385f325b3c/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2776,2789] [2024-11-28 03:42:59,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:42:59,170 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:42:59,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59 WrapperNode [2024-11-28 03:42:59,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:42:59,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:42:59,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:42:59,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:42:59,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,233 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 191 [2024-11-28 03:42:59,233 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:42:59,234 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:42:59,234 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:42:59,234 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:42:59,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,257 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,280 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 03:42:59,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,290 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,292 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:42:59,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:42:59,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:42:59,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:42:59,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (1/1) ... [2024-11-28 03:42:59,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:42:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:42:59,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:42:59,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:42:59,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:42:59,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:42:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:42:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:42:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:42:59,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:42:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:42:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:42:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:42:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:42:59,386 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:42:59,525 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:42:59,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:43:00,241 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:43:00,241 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:43:00,860 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:43:00,860 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 03:43:00,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:00 BoogieIcfgContainer [2024-11-28 03:43:00,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:43:00,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:43:00,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:43:00,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:43:00,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:42:58" (1/3) ... [2024-11-28 03:43:00,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679377b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:43:00, skipping insertion in model container [2024-11-28 03:43:00,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:42:59" (2/3) ... [2024-11-28 03:43:00,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679377b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:43:00, skipping insertion in model container [2024-11-28 03:43:00,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:00" (3/3) ... [2024-11-28 03:43:00,872 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-11-28 03:43:00,890 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:43:00,892 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-trans.wvr.c that has 4 procedures, 32 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-28 03:43:00,892 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:43:01,002 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:43:01,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2024-11-28 03:43:01,111 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-11-28 03:43:01,114 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:43:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-28 03:43:01,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2024-11-28 03:43:01,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2024-11-28 03:43:01,131 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:43:01,145 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;@15e7ddce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:43:01,145 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 03:43:01,165 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:43:01,165 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2024-11-28 03:43:01,165 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:43:01,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:01,166 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] [2024-11-28 03:43:01,167 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:01,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1265546305, now seen corresponding path program 1 times [2024-11-28 03:43:01,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:01,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163053278] [2024-11-28 03:43:01,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163053278] [2024-11-28 03:43:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163053278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:43:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464015040] [2024-11-28 03:43:02,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:02,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:43:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:02,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:43:02,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:43:02,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:02,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:02,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:02,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:02,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:03,332 INFO L124 PetriNetUnfolderBase]: 1693/2288 cut-off events. [2024-11-28 03:43:03,332 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-28 03:43:03,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 2288 events. 1693/2288 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9369 event pairs, 923 based on Foata normal form. 1/1514 useless extension candidates. Maximal degree in co-relation 2641. Up to 1399 conditions per place. [2024-11-28 03:43:03,365 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 31 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2024-11-28 03:43:03,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 63 transitions, 280 flow [2024-11-28 03:43:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:43:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:43:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-11-28 03:43:03,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-11-28 03:43:03,393 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 4 states and 89 transitions. [2024-11-28 03:43:03,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 63 transitions, 280 flow [2024-11-28 03:43:03,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 63 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:43:03,416 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 94 flow [2024-11-28 03:43:03,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-11-28 03:43:03,427 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-11-28 03:43:03,427 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 94 flow [2024-11-28 03:43:03,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:03,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:03,429 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:03,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:43:03,430 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:03,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash -127693067, now seen corresponding path program 1 times [2024-11-28 03:43:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986029568] [2024-11-28 03:43:03,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:04,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986029568] [2024-11-28 03:43:04,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986029568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:04,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4961462] [2024-11-28 03:43:04,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:04,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:04,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:04,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:43:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:04,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:43:04,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:04,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:05,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:43:05,084 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 59 treesize of output 55 [2024-11-28 03:43:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:05,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4961462] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:05,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2024-11-28 03:43:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910804897] [2024-11-28 03:43:05,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:05,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:05,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:05,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:43:05,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:05,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:05,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:05,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:05,975 INFO L124 PetriNetUnfolderBase]: 1898/2559 cut-off events. [2024-11-28 03:43:05,975 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-28 03:43:05,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 2559 events. 1898/2559 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10893 event pairs, 461 based on Foata normal form. 1/1891 useless extension candidates. Maximal degree in co-relation 5366. Up to 1070 conditions per place. [2024-11-28 03:43:05,995 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 50 selfloop transitions, 4 changer transitions 20/78 dead transitions. [2024-11-28 03:43:05,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 78 transitions, 340 flow [2024-11-28 03:43:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:43:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-28 03:43:05,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-28 03:43:05,998 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 94 flow. Second operand 5 states and 110 transitions. [2024-11-28 03:43:05,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 78 transitions, 340 flow [2024-11-28 03:43:06,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 78 transitions, 326 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-28 03:43:06,004 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 108 flow [2024-11-28 03:43:06,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-28 03:43:06,005 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-11-28 03:43:06,005 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 108 flow [2024-11-28 03:43:06,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:06,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:06,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:06,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:43:06,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:06,209 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:06,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1849039551, now seen corresponding path program 1 times [2024-11-28 03:43:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860956406] [2024-11-28 03:43:06,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:06,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:06,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860956406] [2024-11-28 03:43:06,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860956406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:06,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:06,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:43:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155310426] [2024-11-28 03:43:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:06,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:06,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:06,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:06,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:06,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:06,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:06,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:06,951 INFO L124 PetriNetUnfolderBase]: 1509/2082 cut-off events. [2024-11-28 03:43:06,951 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-11-28 03:43:06,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 2082 events. 1509/2082 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8387 event pairs, 886 based on Foata normal form. 57/1580 useless extension candidates. Maximal degree in co-relation 4534. Up to 1870 conditions per place. [2024-11-28 03:43:06,968 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 3 changer transitions 21/60 dead transitions. [2024-11-28 03:43:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 267 flow [2024-11-28 03:43:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-28 03:43:06,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-11-28 03:43:06,971 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 108 flow. Second operand 6 states and 97 transitions. [2024-11-28 03:43:06,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 267 flow [2024-11-28 03:43:06,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 260 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:06,974 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 121 flow [2024-11-28 03:43:06,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-11-28 03:43:06,976 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-11-28 03:43:06,976 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 121 flow [2024-11-28 03:43:06,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:06,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:06,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:06,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:43:06,977 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:06,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash -320956883, now seen corresponding path program 1 times [2024-11-28 03:43:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053961414] [2024-11-28 03:43:06,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:07,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:07,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053961414] [2024-11-28 03:43:07,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053961414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:07,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036786748] [2024-11-28 03:43:07,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:07,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:07,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:43:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:07,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:43:07,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:07,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:08,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:43:08,070 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 59 treesize of output 55 [2024-11-28 03:43:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036786748] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-28 03:43:08,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613664029] [2024-11-28 03:43:08,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:08,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:08,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:08,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:08,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:43:08,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:08,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:08,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:08,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:08,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:09,160 INFO L124 PetriNetUnfolderBase]: 3090/4301 cut-off events. [2024-11-28 03:43:09,160 INFO L125 PetriNetUnfolderBase]: For 1232/1232 co-relation queries the response was YES. [2024-11-28 03:43:09,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 4301 events. 3090/4301 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20668 event pairs, 693 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 9539. Up to 1320 conditions per place. [2024-11-28 03:43:09,199 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 70 selfloop transitions, 6 changer transitions 19/99 dead transitions. [2024-11-28 03:43:09,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 99 transitions, 479 flow [2024-11-28 03:43:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:43:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:43:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-11-28 03:43:09,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:43:09,202 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 121 flow. Second operand 7 states and 140 transitions. [2024-11-28 03:43:09,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 99 transitions, 479 flow [2024-11-28 03:43:09,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 461 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-28 03:43:09,206 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 137 flow [2024-11-28 03:43:09,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-28 03:43:09,207 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-11-28 03:43:09,207 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 137 flow [2024-11-28 03:43:09,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:09,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:09,208 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:09,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:43:09,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:09,413 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:09,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1177791436, now seen corresponding path program 1 times [2024-11-28 03:43:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835017686] [2024-11-28 03:43:09,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:43:09,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:09,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835017686] [2024-11-28 03:43:09,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835017686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:09,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:09,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:43:09,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512538365] [2024-11-28 03:43:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:09,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:09,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:09,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:09,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:09,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:09,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:09,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:09,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:10,323 INFO L124 PetriNetUnfolderBase]: 2709/3833 cut-off events. [2024-11-28 03:43:10,324 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2024-11-28 03:43:10,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9057 conditions, 3833 events. 2709/3833 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17720 event pairs, 1951 based on Foata normal form. 90/3389 useless extension candidates. Maximal degree in co-relation 9032. Up to 3535 conditions per place. [2024-11-28 03:43:10,358 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 35 selfloop transitions, 3 changer transitions 19/61 dead transitions. [2024-11-28 03:43:10,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 305 flow [2024-11-28 03:43:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:43:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-28 03:43:10,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-11-28 03:43:10,360 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 137 flow. Second operand 5 states and 87 transitions. [2024-11-28 03:43:10,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 305 flow [2024-11-28 03:43:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:10,368 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 147 flow [2024-11-28 03:43:10,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-28 03:43:10,369 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-11-28 03:43:10,370 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 147 flow [2024-11-28 03:43:10,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:10,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:10,371 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:10,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:43:10,371 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:10,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -156580004, now seen corresponding path program 1 times [2024-11-28 03:43:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978640048] [2024-11-28 03:43:10,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:10,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978640048] [2024-11-28 03:43:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978640048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929728315] [2024-11-28 03:43:10,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:10,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:10,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:10,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:43:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:10,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:43:10,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:11,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:11,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929728315] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:11,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:11,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-11-28 03:43:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546361378] [2024-11-28 03:43:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:11,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:11,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:11,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:43:11,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:11,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:11,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:11,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:11,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:12,313 INFO L124 PetriNetUnfolderBase]: 4258/6144 cut-off events. [2024-11-28 03:43:12,315 INFO L125 PetriNetUnfolderBase]: For 3257/3257 co-relation queries the response was YES. [2024-11-28 03:43:12,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14865 conditions, 6144 events. 4258/6144 cut-off events. For 3257/3257 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31150 event pairs, 1533 based on Foata normal form. 0/5632 useless extension candidates. Maximal degree in co-relation 14839. Up to 2546 conditions per place. [2024-11-28 03:43:12,389 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 72 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2024-11-28 03:43:12,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 83 transitions, 445 flow [2024-11-28 03:43:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:43:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:43:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-11-28 03:43:12,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-28 03:43:12,393 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 147 flow. Second operand 7 states and 119 transitions. [2024-11-28 03:43:12,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 83 transitions, 445 flow [2024-11-28 03:43:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 433 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:12,402 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 167 flow [2024-11-28 03:43:12,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-11-28 03:43:12,405 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2024-11-28 03:43:12,405 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 167 flow [2024-11-28 03:43:12,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:12,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:12,407 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:12,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:43:12,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 03:43:12,609 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:12,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -841786377, now seen corresponding path program 1 times [2024-11-28 03:43:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685115029] [2024-11-28 03:43:12,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:14,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:14,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685115029] [2024-11-28 03:43:14,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685115029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:14,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:43:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496318266] [2024-11-28 03:43:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:14,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:43:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:14,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:43:14,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:43:14,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:14,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:14,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:14,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:14,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:15,916 INFO L124 PetriNetUnfolderBase]: 4883/7037 cut-off events. [2024-11-28 03:43:15,917 INFO L125 PetriNetUnfolderBase]: For 3650/3650 co-relation queries the response was YES. [2024-11-28 03:43:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18186 conditions, 7037 events. 4883/7037 cut-off events. For 3650/3650 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36938 event pairs, 1035 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 18158. Up to 6187 conditions per place. [2024-11-28 03:43:15,977 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 75 selfloop transitions, 13 changer transitions 2/94 dead transitions. [2024-11-28 03:43:15,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 502 flow [2024-11-28 03:43:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-11-28 03:43:15,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-28 03:43:15,980 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 167 flow. Second operand 6 states and 126 transitions. [2024-11-28 03:43:15,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 502 flow [2024-11-28 03:43:15,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 496 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:15,987 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 276 flow [2024-11-28 03:43:15,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-11-28 03:43:15,988 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-11-28 03:43:15,988 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 276 flow [2024-11-28 03:43:15,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:15,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:15,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:15,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:43:15,989 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:15,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash -914520947, now seen corresponding path program 1 times [2024-11-28 03:43:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:15,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701314188] [2024-11-28 03:43:15,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:43:16,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701314188] [2024-11-28 03:43:16,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701314188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212769554] [2024-11-28 03:43:16,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:16,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:16,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:16,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:43:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:16,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:43:16,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:43:16,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:16,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:43:16,756 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 43 treesize of output 39 [2024-11-28 03:43:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:43:16,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212769554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:16,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:43:16,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-28 03:43:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380795524] [2024-11-28 03:43:16,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:16,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:43:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:16,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:43:16,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:43:16,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:16,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 276 flow. Second operand has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:16,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:16,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:16,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:18,772 INFO L124 PetriNetUnfolderBase]: 8411/12221 cut-off events. [2024-11-28 03:43:18,773 INFO L125 PetriNetUnfolderBase]: For 13245/13245 co-relation queries the response was YES. [2024-11-28 03:43:18,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34853 conditions, 12221 events. 8411/12221 cut-off events. For 13245/13245 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 70088 event pairs, 5532 based on Foata normal form. 172/12378 useless extension candidates. Maximal degree in co-relation 31409. Up to 7015 conditions per place. [2024-11-28 03:43:18,869 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 89 selfloop transitions, 4 changer transitions 23/120 dead transitions. [2024-11-28 03:43:18,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 822 flow [2024-11-28 03:43:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-28 03:43:18,871 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-11-28 03:43:18,871 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 276 flow. Second operand 6 states and 123 transitions. [2024-11-28 03:43:18,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 822 flow [2024-11-28 03:43:18,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 807 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 03:43:18,897 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 306 flow [2024-11-28 03:43:18,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-11-28 03:43:18,898 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2024-11-28 03:43:18,898 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 306 flow [2024-11-28 03:43:18,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:18,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:18,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:18,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:43:19,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:43:19,100 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:19,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash -266732659, now seen corresponding path program 1 times [2024-11-28 03:43:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366013621] [2024-11-28 03:43:19,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366013621] [2024-11-28 03:43:21,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366013621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97054297] [2024-11-28 03:43:21,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:21,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:21,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:21,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:43:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:21,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:43:21,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:22,197 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97054297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:43:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2024-11-28 03:43:22,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700773088] [2024-11-28 03:43:22,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:22,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:43:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:22,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:43:22,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:43:22,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:22,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:22,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:22,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:22,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:23,457 INFO L124 PetriNetUnfolderBase]: 8814/12849 cut-off events. [2024-11-28 03:43:23,458 INFO L125 PetriNetUnfolderBase]: For 11400/11408 co-relation queries the response was YES. [2024-11-28 03:43:23,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36424 conditions, 12849 events. 8814/12849 cut-off events. For 11400/11408 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 75629 event pairs, 1964 based on Foata normal form. 12/12853 useless extension candidates. Maximal degree in co-relation 31005. Up to 8984 conditions per place. [2024-11-28 03:43:23,563 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 102 selfloop transitions, 27 changer transitions 2/135 dead transitions. [2024-11-28 03:43:23,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 135 transitions, 873 flow [2024-11-28 03:43:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:43:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:43:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-28 03:43:23,565 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 03:43:23,565 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 306 flow. Second operand 7 states and 161 transitions. [2024-11-28 03:43:23,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 135 transitions, 873 flow [2024-11-28 03:43:23,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 135 transitions, 857 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:23,620 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 530 flow [2024-11-28 03:43:23,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-11-28 03:43:23,621 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-11-28 03:43:23,621 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 530 flow [2024-11-28 03:43:23,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:23,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:23,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:23,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:43:23,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:23,826 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:23,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash -124436273, now seen corresponding path program 2 times [2024-11-28 03:43:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914082544] [2024-11-28 03:43:23,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:43:23,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:23,916 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:43:23,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914082544] [2024-11-28 03:43:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914082544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490343652] [2024-11-28 03:43:25,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:43:25,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:25,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:43:26,010 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:43:26,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:26,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 03:43:26,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:26,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:28,251 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-11-28 03:43:28,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 235 [2024-11-28 03:43:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490343652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:38,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:43:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2024-11-28 03:43:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832490011] [2024-11-28 03:43:38,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:38,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:43:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:38,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:43:38,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:43:38,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 530 flow. Second operand has 25 states, 25 states have (on average 10.12) internal successors, (253), 25 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:42,499 INFO L124 PetriNetUnfolderBase]: 14169/20660 cut-off events. [2024-11-28 03:43:42,499 INFO L125 PetriNetUnfolderBase]: For 33487/33487 co-relation queries the response was YES. [2024-11-28 03:43:42,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65205 conditions, 20660 events. 14169/20660 cut-off events. For 33487/33487 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 131941 event pairs, 1948 based on Foata normal form. 20/20678 useless extension candidates. Maximal degree in co-relation 61914. Up to 9081 conditions per place. [2024-11-28 03:43:42,616 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 213 selfloop transitions, 87 changer transitions 19/323 dead transitions. [2024-11-28 03:43:42,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 323 transitions, 2214 flow [2024-11-28 03:43:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:43:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:43:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 498 transitions. [2024-11-28 03:43:42,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-11-28 03:43:42,620 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 530 flow. Second operand 27 states and 498 transitions. [2024-11-28 03:43:42,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 323 transitions, 2214 flow [2024-11-28 03:43:42,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 323 transitions, 2194 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-28 03:43:42,789 INFO L231 Difference]: Finished difference. Result has 111 places, 126 transitions, 1249 flow [2024-11-28 03:43:42,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1249, PETRI_PLACES=111, PETRI_TRANSITIONS=126} [2024-11-28 03:43:42,790 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 74 predicate places. [2024-11-28 03:43:42,792 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 126 transitions, 1249 flow [2024-11-28 03:43:42,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.12) internal successors, (253), 25 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:42,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:42,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:42,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:43:42,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:43:42,993 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:42,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 668471339, now seen corresponding path program 1 times [2024-11-28 03:43:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709803004] [2024-11-28 03:43:42,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:44,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709803004] [2024-11-28 03:43:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709803004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:44,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453429915] [2024-11-28 03:43:44,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:44,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:44,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:43:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:44,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:43:44,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:44,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:45,768 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-11-28 03:43:45,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-11-28 03:43:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:43:55,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453429915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:55,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:43:55,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-11-28 03:43:55,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626540189] [2024-11-28 03:43:55,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:55,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:43:55,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:55,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:43:55,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:43:55,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:43:55,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 126 transitions, 1249 flow. Second operand has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:55,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:55,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:43:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:58,998 INFO L124 PetriNetUnfolderBase]: 16567/24216 cut-off events. [2024-11-28 03:43:58,998 INFO L125 PetriNetUnfolderBase]: For 88009/88009 co-relation queries the response was YES. [2024-11-28 03:43:59,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91329 conditions, 24216 events. 16567/24216 cut-off events. For 88009/88009 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 156112 event pairs, 3662 based on Foata normal form. 16/24222 useless extension candidates. Maximal degree in co-relation 87526. Up to 14981 conditions per place. [2024-11-28 03:43:59,151 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 141 selfloop transitions, 63 changer transitions 3/211 dead transitions. [2024-11-28 03:43:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 211 transitions, 2174 flow [2024-11-28 03:43:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:43:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:43:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-11-28 03:43:59,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-11-28 03:43:59,153 INFO L175 Difference]: Start difference. First operand has 111 places, 126 transitions, 1249 flow. Second operand 12 states and 207 transitions. [2024-11-28 03:43:59,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 211 transitions, 2174 flow [2024-11-28 03:43:59,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 211 transitions, 1872 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-11-28 03:43:59,624 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1313 flow [2024-11-28 03:43:59,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1313, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-11-28 03:43:59,625 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-11-28 03:43:59,625 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1313 flow [2024-11-28 03:43:59,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:59,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:59,626 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:59,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:43:59,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:59,829 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:43:59,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 736612525, now seen corresponding path program 2 times [2024-11-28 03:43:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:59,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648265779] [2024-11-28 03:43:59,830 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:43:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:59,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:43:59,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:00,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648265779] [2024-11-28 03:44:00,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648265779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:00,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:00,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:44:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652874742] [2024-11-28 03:44:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:00,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:44:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:00,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:44:00,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:44:00,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:44:00,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1313 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:00,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:00,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:44:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:03,987 INFO L124 PetriNetUnfolderBase]: 17915/26160 cut-off events. [2024-11-28 03:44:03,987 INFO L125 PetriNetUnfolderBase]: For 90373/90373 co-relation queries the response was YES. [2024-11-28 03:44:04,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98113 conditions, 26160 events. 17915/26160 cut-off events. For 90373/90373 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 169044 event pairs, 7311 based on Foata normal form. 8/26158 useless extension candidates. Maximal degree in co-relation 92864. Up to 22571 conditions per place. [2024-11-28 03:44:04,145 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 57 changer transitions 2/203 dead transitions. [2024-11-28 03:44:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 2088 flow [2024-11-28 03:44:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:44:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:44:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-11-28 03:44:04,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-11-28 03:44:04,147 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1313 flow. Second operand 8 states and 158 transitions. [2024-11-28 03:44:04,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 2088 flow [2024-11-28 03:44:04,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 2001 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-28 03:44:04,756 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1580 flow [2024-11-28 03:44:04,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1580, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-11-28 03:44:04,756 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 81 predicate places. [2024-11-28 03:44:04,757 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1580 flow [2024-11-28 03:44:04,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:04,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:04,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:04,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:44:04,757 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:44:04,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1193420665, now seen corresponding path program 3 times [2024-11-28 03:44:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986064209] [2024-11-28 03:44:04,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:44:04,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:04,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:44:04,786 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986064209] [2024-11-28 03:44:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986064209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:44:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452217783] [2024-11-28 03:44:05,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:05,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:44:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:05,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:44:05,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:44:05,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:44:05,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1580 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:05,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:05,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:44:05,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:09,313 INFO L124 PetriNetUnfolderBase]: 20939/30576 cut-off events. [2024-11-28 03:44:09,313 INFO L125 PetriNetUnfolderBase]: For 116105/116105 co-relation queries the response was YES. [2024-11-28 03:44:09,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117405 conditions, 30576 events. 20939/30576 cut-off events. For 116105/116105 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 203467 event pairs, 6725 based on Foata normal form. 16/30582 useless extension candidates. Maximal degree in co-relation 111965. Up to 23127 conditions per place. [2024-11-28 03:44:09,506 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 67 changer transitions 3/227 dead transitions. [2024-11-28 03:44:09,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 227 transitions, 2431 flow [2024-11-28 03:44:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:44:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:44:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-11-28 03:44:09,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-28 03:44:09,507 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1580 flow. Second operand 8 states and 168 transitions. [2024-11-28 03:44:09,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 227 transitions, 2431 flow [2024-11-28 03:44:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 227 transitions, 2353 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 03:44:10,734 INFO L231 Difference]: Finished difference. Result has 124 places, 166 transitions, 1839 flow [2024-11-28 03:44:10,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1839, PETRI_PLACES=124, PETRI_TRANSITIONS=166} [2024-11-28 03:44:10,735 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 87 predicate places. [2024-11-28 03:44:10,735 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 166 transitions, 1839 flow [2024-11-28 03:44:10,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:10,736 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:10,736 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:10,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:44:10,736 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:44:10,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1526992447, now seen corresponding path program 4 times [2024-11-28 03:44:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:10,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880305579] [2024-11-28 03:44:10,736 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:44:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:10,767 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:44:10,767 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880305579] [2024-11-28 03:44:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880305579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088658848] [2024-11-28 03:44:12,007 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:44:12,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:12,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:12,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:12,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:44:12,158 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:44:12,158 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:12,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:44:12,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:12,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:14,060 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-11-28 03:44:14,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 235 [2024-11-28 03:44:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:25,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088658848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:25,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 21 [2024-11-28 03:44:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868016072] [2024-11-28 03:44:25,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:25,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:44:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:25,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:44:25,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:44:25,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:44:25,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 166 transitions, 1839 flow. Second operand has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:25,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:25,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:44:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:32,615 INFO L124 PetriNetUnfolderBase]: 29873/43836 cut-off events. [2024-11-28 03:44:32,615 INFO L125 PetriNetUnfolderBase]: For 190215/190215 co-relation queries the response was YES. [2024-11-28 03:44:32,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169663 conditions, 43836 events. 29873/43836 cut-off events. For 190215/190215 co-relation queries the response was YES. Maximal size of possible extension queue 2159. Compared 310273 event pairs, 6844 based on Foata normal form. 24/43858 useless extension candidates. Maximal degree in co-relation 160825. Up to 16741 conditions per place. [2024-11-28 03:44:32,897 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 240 selfloop transitions, 185 changer transitions 23/452 dead transitions. [2024-11-28 03:44:32,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 452 transitions, 4482 flow [2024-11-28 03:44:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:44:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:44:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 503 transitions. [2024-11-28 03:44:32,900 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46574074074074073 [2024-11-28 03:44:32,900 INFO L175 Difference]: Start difference. First operand has 124 places, 166 transitions, 1839 flow. Second operand 27 states and 503 transitions. [2024-11-28 03:44:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 452 transitions, 4482 flow [2024-11-28 03:44:35,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 452 transitions, 4346 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-28 03:44:35,203 INFO L231 Difference]: Finished difference. Result has 159 places, 256 transitions, 3377 flow [2024-11-28 03:44:35,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3377, PETRI_PLACES=159, PETRI_TRANSITIONS=256} [2024-11-28 03:44:35,203 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 122 predicate places. [2024-11-28 03:44:35,204 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 256 transitions, 3377 flow [2024-11-28 03:44:35,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:35,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:35,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:35,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:44:35,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:44:35,405 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:44:35,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash -703718775, now seen corresponding path program 1 times [2024-11-28 03:44:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:35,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144723590] [2024-11-28 03:44:35,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144723590] [2024-11-28 03:44:36,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144723590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808174521] [2024-11-28 03:44:36,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:36,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:36,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:44:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:36,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:44:36,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:36,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:37,335 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-11-28 03:44:37,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-11-28 03:44:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:45,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808174521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:45,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:45,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2024-11-28 03:44:45,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301460726] [2024-11-28 03:44:45,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:45,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:44:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:45,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:44:45,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:44:45,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:44:45,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 256 transitions, 3377 flow. Second operand has 23 states, 23 states have (on average 10.652173913043478) internal successors, (245), 23 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:45,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:45,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:44:45,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:52,171 INFO L124 PetriNetUnfolderBase]: 33225/48778 cut-off events. [2024-11-28 03:44:52,172 INFO L125 PetriNetUnfolderBase]: For 303037/303049 co-relation queries the response was YES. [2024-11-28 03:44:52,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208704 conditions, 48778 events. 33225/48778 cut-off events. For 303037/303049 co-relation queries the response was YES. Maximal size of possible extension queue 2393. Compared 349707 event pairs, 8331 based on Foata normal form. 178/48950 useless extension candidates. Maximal degree in co-relation 206856. Up to 26429 conditions per place. [2024-11-28 03:44:52,608 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 126 changer transitions 2/350 dead transitions. [2024-11-28 03:44:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 350 transitions, 4653 flow [2024-11-28 03:44:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:44:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:44:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-11-28 03:44:52,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-11-28 03:44:52,609 INFO L175 Difference]: Start difference. First operand has 159 places, 256 transitions, 3377 flow. Second operand 10 states and 206 transitions. [2024-11-28 03:44:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 350 transitions, 4653 flow [2024-11-28 03:44:57,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 350 transitions, 4437 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-11-28 03:44:57,110 INFO L231 Difference]: Finished difference. Result has 163 places, 265 transitions, 3584 flow [2024-11-28 03:44:57,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3584, PETRI_PLACES=163, PETRI_TRANSITIONS=265} [2024-11-28 03:44:57,111 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 126 predicate places. [2024-11-28 03:44:57,111 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 265 transitions, 3584 flow [2024-11-28 03:44:57,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.652173913043478) internal successors, (245), 23 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:57,111 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:57,111 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:57,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:44:57,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:44:57,312 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:44:57,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1353441701, now seen corresponding path program 2 times [2024-11-28 03:44:57,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:57,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4400343] [2024-11-28 03:44:57,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:57,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:57,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:58,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4400343] [2024-11-28 03:44:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4400343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208149328] [2024-11-28 03:44:58,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:58,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:58,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb320c68-70bc-4563-83fa-d4385f325b3c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:44:58,455 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:58,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:58,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:44:58,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:44:58,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:59,515 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-11-28 03:44:59,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-11-28 03:45:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208149328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:02,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:02,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2024-11-28 03:45:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994436258] [2024-11-28 03:45:02,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:02,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:45:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:02,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:45:02,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:45:02,861 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:45:02,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 265 transitions, 3584 flow. Second operand has 22 states, 22 states have (on average 10.227272727272727) internal successors, (225), 22 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:02,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:02,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:45:02,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand