./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.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_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/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_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/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_72fb0780-0731-4324-9cdc-3fd948fed22d/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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:50:55,157 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:50:55,254 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:50:55,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:50:55,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:50:55,289 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:50:55,290 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:50:55,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:50:55,291 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:50:55,292 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:50:55,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:50:55,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:50:55,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:50:55,293 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:50:55,294 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:50:55,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:50:55,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:50:55,294 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:50:55,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:50:55,295 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:50:55,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:55,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:55,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:55,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:55,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:50:55,296 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:55,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:50:55,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:50:55,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:50:55,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:50:55,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:50:55,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:50:55,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:50:55,298 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_72fb0780-0731-4324-9cdc-3fd948fed22d/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 -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2024-11-27 19:50:55,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:50:55,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:50:55,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:50:55,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:50:55,662 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:50:55,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2024-11-27 19:50:58,799 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/data/6f59c1b65/8ad505e7681444caa47e2b22d46b5cb9/FLAGdcebfa607 [2024-11-27 19:50:59,123 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:50:59,124 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/sv-benchmarks/c/weaver/mult-dist.wvr.c [2024-11-27 19:50:59,131 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/data/6f59c1b65/8ad505e7681444caa47e2b22d46b5cb9/FLAGdcebfa607 [2024-11-27 19:50:59,384 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/data/6f59c1b65/8ad505e7681444caa47e2b22d46b5cb9 [2024-11-27 19:50:59,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:50:59,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:50:59,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:59,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:50:59,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:50:59,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa79b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59, skipping insertion in model container [2024-11-27 19:50:59,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,422 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:50:59,621 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_72fb0780-0731-4324-9cdc-3fd948fed22d/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2024-11-27 19:50:59,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:59,633 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:50:59,655 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_72fb0780-0731-4324-9cdc-3fd948fed22d/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2024-11-27 19:50:59,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:59,671 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:50:59,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59 WrapperNode [2024-11-27 19:50:59,672 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:59,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:59,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:50:59,675 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:50:59,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,711 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-11-27 19:50:59,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:59,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:50:59,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:50:59,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:50:59,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,731 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,754 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 19:50:59,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,760 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:50:59,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:50:59,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:50:59,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:50:59,775 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (1/1) ... [2024-11-27 19:50:59,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:59,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:50:59,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:50:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:50:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:50:59,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:50:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:50:59,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:50:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:50:59,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:50:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:50:59,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:50:59,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:50:59,852 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:50:59,965 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:50:59,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:51:00,254 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:51:00,256 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:51:00,487 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:51:00,487 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 19:51:00,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:00 BoogieIcfgContainer [2024-11-27 19:51:00,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:51:00,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:51:00,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:51:00,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:51:00,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:50:59" (1/3) ... [2024-11-27 19:51:00,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bd04dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:00, skipping insertion in model container [2024-11-27 19:51:00,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:59" (2/3) ... [2024-11-27 19:51:00,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bd04dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:00, skipping insertion in model container [2024-11-27 19:51:00,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:00" (3/3) ... [2024-11-27 19:51:00,501 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-11-27 19:51:00,520 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:51:00,522 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-dist.wvr.c that has 4 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-27 19:51:00,522 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:51:00,609 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 19:51:00,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2024-11-27 19:51:00,688 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-27 19:51:00,690 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:51:00,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-27 19:51:00,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2024-11-27 19:51:00,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2024-11-27 19:51:00,720 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:51:00,737 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;@4a09b903, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:51:00,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 19:51:00,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:51:00,758 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-27 19:51:00,759 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:51:00,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:00,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:00,762 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)] === [2024-11-27 19:51:00,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash -374601822, now seen corresponding path program 1 times [2024-11-27 19:51:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908386654] [2024-11-27 19:51:00,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908386654] [2024-11-27 19:51:01,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908386654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:01,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:01,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:51:01,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666244921] [2024-11-27 19:51:01,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:01,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:01,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:01,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:01,721 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:01,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:01,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:01,988 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2024-11-27 19:51:01,989 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-27 19:51:01,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1783 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-27 19:51:02,003 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2024-11-27 19:51:02,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2024-11-27 19:51:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:51:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-27 19:51:02,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-27 19:51:02,022 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2024-11-27 19:51:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2024-11-27 19:51:02,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 19:51:02,037 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2024-11-27 19:51:02,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-11-27 19:51:02,046 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-27 19:51:02,047 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2024-11-27 19:51:02,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:02,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:02,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:02,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:51:02,048 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)] === [2024-11-27 19:51:02,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash -721346966, now seen corresponding path program 1 times [2024-11-27 19:51:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:02,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168708888] [2024-11-27 19:51:02,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:02,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168708888] [2024-11-27 19:51:02,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168708888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:02,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:02,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:51:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907147478] [2024-11-27 19:51:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:02,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:02,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:02,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:51:02,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:02,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:02,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:02,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:02,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:02,922 INFO L124 PetriNetUnfolderBase]: 544/771 cut-off events. [2024-11-27 19:51:02,922 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-11-27 19:51:02,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 771 events. 544/771 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2537 event pairs, 203 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 545. Up to 554 conditions per place. [2024-11-27 19:51:02,934 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 47 selfloop transitions, 18 changer transitions 3/69 dead transitions. [2024-11-27 19:51:02,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 347 flow [2024-11-27 19:51:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-11-27 19:51:02,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-11-27 19:51:02,937 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 87 transitions. [2024-11-27 19:51:02,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 347 flow [2024-11-27 19:51:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:02,943 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 198 flow [2024-11-27 19:51:02,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2024-11-27 19:51:02,945 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-11-27 19:51:02,946 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 198 flow [2024-11-27 19:51:02,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:02,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:02,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:02,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:51:02,947 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)] === [2024-11-27 19:51:02,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 816459937, now seen corresponding path program 1 times [2024-11-27 19:51:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:02,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308263454] [2024-11-27 19:51:02,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:03,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:03,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308263454] [2024-11-27 19:51:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308263454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:03,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718590085] [2024-11-27 19:51:03,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:03,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:03,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:03,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:51:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:03,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:03,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:03,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718590085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:04,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-11-27 19:51:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798065545] [2024-11-27 19:51:04,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:04,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:51:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:04,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:51:04,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:51:04,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:04,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 198 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:04,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:04,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:06,573 INFO L124 PetriNetUnfolderBase]: 1135/1672 cut-off events. [2024-11-27 19:51:06,573 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-11-27 19:51:06,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5285 conditions, 1672 events. 1135/1672 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7037 event pairs, 142 based on Foata normal form. 24/1696 useless extension candidates. Maximal degree in co-relation 3157. Up to 542 conditions per place. [2024-11-27 19:51:06,615 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 170 selfloop transitions, 60 changer transitions 0/231 dead transitions. [2024-11-27 19:51:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 231 transitions, 1367 flow [2024-11-27 19:51:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:51:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 19:51:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 300 transitions. [2024-11-27 19:51:06,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-27 19:51:06,620 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 198 flow. Second operand 22 states and 300 transitions. [2024-11-27 19:51:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 231 transitions, 1367 flow [2024-11-27 19:51:06,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 231 transitions, 1345 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:06,634 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 718 flow [2024-11-27 19:51:06,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=718, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2024-11-27 19:51:06,636 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-11-27 19:51:06,636 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 718 flow [2024-11-27 19:51:06,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:06,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:06,637 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:06,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:06,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-27 19:51:06,842 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)] === [2024-11-27 19:51:06,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1539085174, now seen corresponding path program 2 times [2024-11-27 19:51:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523412077] [2024-11-27 19:51:06,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:06,866 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:06,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523412077] [2024-11-27 19:51:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523412077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005051484] [2024-11-27 19:51:07,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:07,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:07,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:51:07,164 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:07,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:07,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:07,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:07,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005051484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:07,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:07,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2024-11-27 19:51:07,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368603435] [2024-11-27 19:51:07,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:07,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:07,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:07,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:51:07,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:08,129 INFO L124 PetriNetUnfolderBase]: 1536/2293 cut-off events. [2024-11-27 19:51:08,130 INFO L125 PetriNetUnfolderBase]: For 21136/21136 co-relation queries the response was YES. [2024-11-27 19:51:08,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12756 conditions, 2293 events. 1536/2293 cut-off events. For 21136/21136 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10330 event pairs, 475 based on Foata normal form. 8/2301 useless extension candidates. Maximal degree in co-relation 9708. Up to 1296 conditions per place. [2024-11-27 19:51:08,157 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 150 selfloop transitions, 30 changer transitions 4/185 dead transitions. [2024-11-27 19:51:08,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 185 transitions, 1736 flow [2024-11-27 19:51:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-11-27 19:51:08,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-11-27 19:51:08,158 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 718 flow. Second operand 7 states and 92 transitions. [2024-11-27 19:51:08,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 185 transitions, 1736 flow [2024-11-27 19:51:08,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 185 transitions, 1600 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:08,236 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 861 flow [2024-11-27 19:51:08,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-11-27 19:51:08,237 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-11-27 19:51:08,237 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 861 flow [2024-11-27 19:51:08,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:08,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:08,238 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:08,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:51:08,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:08,442 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)] === [2024-11-27 19:51:08,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1535954431, now seen corresponding path program 2 times [2024-11-27 19:51:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:08,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877132820] [2024-11-27 19:51:08,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:08,472 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:08,472 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:08,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877132820] [2024-11-27 19:51:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877132820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360061463] [2024-11-27 19:51:08,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:08,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:08,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:51:08,887 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:08,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:08,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:08,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:09,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360061463] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:09,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 16 [2024-11-27 19:51:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353074946] [2024-11-27 19:51:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:09,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:09,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:09,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:09,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:51:09,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:09,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:09,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:09,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:09,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:10,452 INFO L124 PetriNetUnfolderBase]: 1896/2839 cut-off events. [2024-11-27 19:51:10,453 INFO L125 PetriNetUnfolderBase]: For 29221/29221 co-relation queries the response was YES. [2024-11-27 19:51:10,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17175 conditions, 2839 events. 1896/2839 cut-off events. For 29221/29221 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13031 event pairs, 388 based on Foata normal form. 4/2843 useless extension candidates. Maximal degree in co-relation 13182. Up to 1003 conditions per place. [2024-11-27 19:51:10,488 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 150 selfloop transitions, 66 changer transitions 0/217 dead transitions. [2024-11-27 19:51:10,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 217 transitions, 2164 flow [2024-11-27 19:51:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:51:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 19:51:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-11-27 19:51:10,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5381818181818182 [2024-11-27 19:51:10,490 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 861 flow. Second operand 11 states and 148 transitions. [2024-11-27 19:51:10,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 217 transitions, 2164 flow [2024-11-27 19:51:10,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 217 transitions, 2018 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:10,575 INFO L231 Difference]: Finished difference. Result has 96 places, 140 transitions, 1390 flow [2024-11-27 19:51:10,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1390, PETRI_PLACES=96, PETRI_TRANSITIONS=140} [2024-11-27 19:51:10,576 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-11-27 19:51:10,576 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 140 transitions, 1390 flow [2024-11-27 19:51:10,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:10,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:10,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:10,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:51:10,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:10,777 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)] === [2024-11-27 19:51:10,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash 502048830, now seen corresponding path program 1 times [2024-11-27 19:51:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989112690] [2024-11-27 19:51:10,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:10,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989112690] [2024-11-27 19:51:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989112690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:10,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:10,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:51:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537818796] [2024-11-27 19:51:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:10,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:10,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:10,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:10,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:51:10,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:10,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 140 transitions, 1390 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:10,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:10,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:10,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:11,682 INFO L124 PetriNetUnfolderBase]: 1954/2921 cut-off events. [2024-11-27 19:51:11,682 INFO L125 PetriNetUnfolderBase]: For 34615/34615 co-relation queries the response was YES. [2024-11-27 19:51:11,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18231 conditions, 2921 events. 1954/2921 cut-off events. For 34615/34615 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13620 event pairs, 827 based on Foata normal form. 4/2925 useless extension candidates. Maximal degree in co-relation 17441. Up to 2433 conditions per place. [2024-11-27 19:51:11,719 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 157 selfloop transitions, 37 changer transitions 5/200 dead transitions. [2024-11-27 19:51:11,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 200 transitions, 2381 flow [2024-11-27 19:51:11,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-11-27 19:51:11,721 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-11-27 19:51:11,721 INFO L175 Difference]: Start difference. First operand has 96 places, 140 transitions, 1390 flow. Second operand 7 states and 90 transitions. [2024-11-27 19:51:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 200 transitions, 2381 flow [2024-11-27 19:51:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 200 transitions, 2319 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:11,813 INFO L231 Difference]: Finished difference. Result has 107 places, 156 transitions, 1701 flow [2024-11-27 19:51:11,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1701, PETRI_PLACES=107, PETRI_TRANSITIONS=156} [2024-11-27 19:51:11,816 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-11-27 19:51:11,816 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 156 transitions, 1701 flow [2024-11-27 19:51:11,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:11,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:11,816 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:11,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 19:51:11,817 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)] === [2024-11-27 19:51:11,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -170663126, now seen corresponding path program 3 times [2024-11-27 19:51:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:11,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 19:51:11,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:11,841 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:11,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 19:51:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45761065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090310911] [2024-11-27 19:51:12,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:12,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:12,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:12,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:51:12,241 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:12,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:12,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:12,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:12,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:12,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090310911] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:12,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:12,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 15 [2024-11-27 19:51:12,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646185958] [2024-11-27 19:51:12,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:12,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:12,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:12,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:51:12,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:12,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 156 transitions, 1701 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:12,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:12,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:12,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:13,668 INFO L124 PetriNetUnfolderBase]: 2274/3378 cut-off events. [2024-11-27 19:51:13,669 INFO L125 PetriNetUnfolderBase]: For 50070/50070 co-relation queries the response was YES. [2024-11-27 19:51:13,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22947 conditions, 3378 events. 2274/3378 cut-off events. For 50070/50070 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15979 event pairs, 679 based on Foata normal form. 8/3386 useless extension candidates. Maximal degree in co-relation 22091. Up to 1659 conditions per place. [2024-11-27 19:51:13,703 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 192 selfloop transitions, 60 changer transitions 1/254 dead transitions. [2024-11-27 19:51:13,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 254 transitions, 3153 flow [2024-11-27 19:51:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:51:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 19:51:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-11-27 19:51:13,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-11-27 19:51:13,707 INFO L175 Difference]: Start difference. First operand has 107 places, 156 transitions, 1701 flow. Second operand 9 states and 115 transitions. [2024-11-27 19:51:13,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 254 transitions, 3153 flow [2024-11-27 19:51:13,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 254 transitions, 2969 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-11-27 19:51:13,869 INFO L231 Difference]: Finished difference. Result has 116 places, 202 transitions, 2372 flow [2024-11-27 19:51:13,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2372, PETRI_PLACES=116, PETRI_TRANSITIONS=202} [2024-11-27 19:51:13,870 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2024-11-27 19:51:13,870 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 202 transitions, 2372 flow [2024-11-27 19:51:13,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:13,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:13,870 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:13,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:51:14,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:14,074 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)] === [2024-11-27 19:51:14,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:14,075 INFO L85 PathProgramCache]: Analyzing trace with hash 594448364, now seen corresponding path program 2 times [2024-11-27 19:51:14,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:14,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721597877] [2024-11-27 19:51:14,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:14,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:14,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:14,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721597877] [2024-11-27 19:51:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721597877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398071303] [2024-11-27 19:51:14,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:14,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:51:14,397 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:14,398 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:14,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:51:14,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:14,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398071303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2024-11-27 19:51:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931703948] [2024-11-27 19:51:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:14,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:14,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:14,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:14,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 202 transitions, 2372 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:14,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:14,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:15,214 INFO L124 PetriNetUnfolderBase]: 2446/3603 cut-off events. [2024-11-27 19:51:15,214 INFO L125 PetriNetUnfolderBase]: For 58428/58428 co-relation queries the response was YES. [2024-11-27 19:51:15,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25537 conditions, 3603 events. 2446/3603 cut-off events. For 58428/58428 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17183 event pairs, 805 based on Foata normal form. 4/3607 useless extension candidates. Maximal degree in co-relation 24717. Up to 2846 conditions per place. [2024-11-27 19:51:15,258 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 213 selfloop transitions, 83 changer transitions 5/302 dead transitions. [2024-11-27 19:51:15,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 302 transitions, 4202 flow [2024-11-27 19:51:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-11-27 19:51:15,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-11-27 19:51:15,259 INFO L175 Difference]: Start difference. First operand has 116 places, 202 transitions, 2372 flow. Second operand 7 states and 87 transitions. [2024-11-27 19:51:15,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 302 transitions, 4202 flow [2024-11-27 19:51:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 302 transitions, 3914 flow, removed 144 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:15,543 INFO L231 Difference]: Finished difference. Result has 127 places, 249 transitions, 3154 flow [2024-11-27 19:51:15,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3154, PETRI_PLACES=127, PETRI_TRANSITIONS=249} [2024-11-27 19:51:15,546 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2024-11-27 19:51:15,546 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 249 transitions, 3154 flow [2024-11-27 19:51:15,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:15,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:15,547 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:15,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:15,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:15,747 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)] === [2024-11-27 19:51:15,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1679173404, now seen corresponding path program 3 times [2024-11-27 19:51:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:15,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48323350] [2024-11-27 19:51:15,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:15,765 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:15,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:16,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48323350] [2024-11-27 19:51:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48323350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:16,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099098241] [2024-11-27 19:51:16,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:16,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:16,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:16,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:51:16,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:16,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:16,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:51:16,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:16,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099098241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:16,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:16,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2024-11-27 19:51:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598037358] [2024-11-27 19:51:16,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:16,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:16,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:16,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:16,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:16,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 249 transitions, 3154 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:16,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:16,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:16,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:16,925 INFO L124 PetriNetUnfolderBase]: 2494/3671 cut-off events. [2024-11-27 19:51:16,925 INFO L125 PetriNetUnfolderBase]: For 55215/55215 co-relation queries the response was YES. [2024-11-27 19:51:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26092 conditions, 3671 events. 2494/3671 cut-off events. For 55215/55215 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17441 event pairs, 706 based on Foata normal form. 4/3675 useless extension candidates. Maximal degree in co-relation 25787. Up to 2779 conditions per place. [2024-11-27 19:51:16,955 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 196 selfloop transitions, 148 changer transitions 5/350 dead transitions. [2024-11-27 19:51:16,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 350 transitions, 5146 flow [2024-11-27 19:51:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-11-27 19:51:16,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-11-27 19:51:16,957 INFO L175 Difference]: Start difference. First operand has 127 places, 249 transitions, 3154 flow. Second operand 7 states and 86 transitions. [2024-11-27 19:51:16,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 350 transitions, 5146 flow [2024-11-27 19:51:17,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 350 transitions, 4896 flow, removed 125 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:17,223 INFO L231 Difference]: Finished difference. Result has 135 places, 292 transitions, 4132 flow [2024-11-27 19:51:17,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4132, PETRI_PLACES=135, PETRI_TRANSITIONS=292} [2024-11-27 19:51:17,224 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 107 predicate places. [2024-11-27 19:51:17,224 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 292 transitions, 4132 flow [2024-11-27 19:51:17,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:17,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:17,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:17,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:51:17,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:17,430 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)] === [2024-11-27 19:51:17,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2083647794, now seen corresponding path program 4 times [2024-11-27 19:51:17,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:17,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419474720] [2024-11-27 19:51:17,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:17,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:17,444 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:17,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419474720] [2024-11-27 19:51:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419474720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:17,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:17,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:51:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938882550] [2024-11-27 19:51:17,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:17,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:51:17,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:17,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 292 transitions, 4132 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:17,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:17,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:17,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:18,342 INFO L124 PetriNetUnfolderBase]: 2525/3743 cut-off events. [2024-11-27 19:51:18,342 INFO L125 PetriNetUnfolderBase]: For 57887/57887 co-relation queries the response was YES. [2024-11-27 19:51:18,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27628 conditions, 3743 events. 2525/3743 cut-off events. For 57887/57887 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18137 event pairs, 618 based on Foata normal form. 8/3751 useless extension candidates. Maximal degree in co-relation 27071. Up to 2125 conditions per place. [2024-11-27 19:51:18,374 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 278 selfloop transitions, 75 changer transitions 6/360 dead transitions. [2024-11-27 19:51:18,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 360 transitions, 5502 flow [2024-11-27 19:51:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-27 19:51:18,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-27 19:51:18,375 INFO L175 Difference]: Start difference. First operand has 135 places, 292 transitions, 4132 flow. Second operand 6 states and 87 transitions. [2024-11-27 19:51:18,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 360 transitions, 5502 flow [2024-11-27 19:51:18,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 360 transitions, 5196 flow, removed 153 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:18,706 INFO L231 Difference]: Finished difference. Result has 142 places, 297 transitions, 4131 flow [2024-11-27 19:51:18,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4131, PETRI_PLACES=142, PETRI_TRANSITIONS=297} [2024-11-27 19:51:18,707 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2024-11-27 19:51:18,707 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 297 transitions, 4131 flow [2024-11-27 19:51:18,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:18,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:18,707 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:18,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 19:51:18,708 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)] === [2024-11-27 19:51:18,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -7784350, now seen corresponding path program 4 times [2024-11-27 19:51:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622775773] [2024-11-27 19:51:18,708 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:18,723 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:18,723 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622775773] [2024-11-27 19:51:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622775773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901667806] [2024-11-27 19:51:18,901 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:18,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:18,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:51:18,987 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:18,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:18,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:51:18,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:19,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901667806] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:19,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:19,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2024-11-27 19:51:19,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091780534] [2024-11-27 19:51:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:19,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:19,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:19,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:19,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:51:19,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:19,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 297 transitions, 4131 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:19,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:19,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:19,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:20,386 INFO L124 PetriNetUnfolderBase]: 3140/4653 cut-off events. [2024-11-27 19:51:20,386 INFO L125 PetriNetUnfolderBase]: For 71875/71875 co-relation queries the response was YES. [2024-11-27 19:51:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34224 conditions, 4653 events. 3140/4653 cut-off events. For 71875/71875 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23429 event pairs, 498 based on Foata normal form. 13/4666 useless extension candidates. Maximal degree in co-relation 33798. Up to 1935 conditions per place. [2024-11-27 19:51:20,415 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 302 selfloop transitions, 198 changer transitions 3/504 dead transitions. [2024-11-27 19:51:20,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 504 transitions, 8052 flow [2024-11-27 19:51:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-11-27 19:51:20,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-11-27 19:51:20,420 INFO L175 Difference]: Start difference. First operand has 142 places, 297 transitions, 4131 flow. Second operand 7 states and 102 transitions. [2024-11-27 19:51:20,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 504 transitions, 8052 flow [2024-11-27 19:51:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 504 transitions, 7767 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:20,720 INFO L231 Difference]: Finished difference. Result has 151 places, 417 transitions, 6607 flow [2024-11-27 19:51:20,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6607, PETRI_PLACES=151, PETRI_TRANSITIONS=417} [2024-11-27 19:51:20,721 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 123 predicate places. [2024-11-27 19:51:20,721 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 417 transitions, 6607 flow [2024-11-27 19:51:20,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:20,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:20,721 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:20,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:51:20,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 19:51:20,922 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)] === [2024-11-27 19:51:20,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:20,922 INFO L85 PathProgramCache]: Analyzing trace with hash -917349056, now seen corresponding path program 5 times [2024-11-27 19:51:20,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:20,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158869430] [2024-11-27 19:51:20,922 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:20,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:20,935 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:20,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:21,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158869430] [2024-11-27 19:51:21,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158869430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495519142] [2024-11-27 19:51:21,187 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:21,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:21,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:51:21,271 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:21,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:21,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:21,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:21,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:21,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495519142] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:21,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:21,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 17 [2024-11-27 19:51:21,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899600464] [2024-11-27 19:51:21,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:21,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:21,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:21,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:51:21,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:21,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 417 transitions, 6607 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:21,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:21,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:21,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:23,031 INFO L124 PetriNetUnfolderBase]: 3647/5418 cut-off events. [2024-11-27 19:51:23,031 INFO L125 PetriNetUnfolderBase]: For 95738/95738 co-relation queries the response was YES. [2024-11-27 19:51:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43286 conditions, 5418 events. 3647/5418 cut-off events. For 95738/95738 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28185 event pairs, 511 based on Foata normal form. 26/5444 useless extension candidates. Maximal degree in co-relation 43013. Up to 1725 conditions per place. [2024-11-27 19:51:23,064 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 357 selfloop transitions, 210 changer transitions 2/570 dead transitions. [2024-11-27 19:51:23,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 570 transitions, 9897 flow [2024-11-27 19:51:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:51:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:51:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-11-27 19:51:23,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-11-27 19:51:23,066 INFO L175 Difference]: Start difference. First operand has 151 places, 417 transitions, 6607 flow. Second operand 8 states and 123 transitions. [2024-11-27 19:51:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 570 transitions, 9897 flow [2024-11-27 19:51:23,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 570 transitions, 9735 flow, removed 81 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:23,640 INFO L231 Difference]: Finished difference. Result has 163 places, 465 transitions, 8210 flow [2024-11-27 19:51:23,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8210, PETRI_PLACES=163, PETRI_TRANSITIONS=465} [2024-11-27 19:51:23,641 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 135 predicate places. [2024-11-27 19:51:23,641 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 465 transitions, 8210 flow [2024-11-27 19:51:23,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:23,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:23,641 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:23,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:23,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 19:51:23,845 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)] === [2024-11-27 19:51:23,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:23,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1785318697, now seen corresponding path program 3 times [2024-11-27 19:51:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:23,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884489714] [2024-11-27 19:51:23,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:23,871 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:23,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:24,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884489714] [2024-11-27 19:51:24,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884489714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099367130] [2024-11-27 19:51:24,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:24,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:24,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:51:24,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:24,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:24,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:24,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:24,369 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:51:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099367130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:24,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:51:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2024-11-27 19:51:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952107786] [2024-11-27 19:51:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:24,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:24,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:24,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:51:24,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:24,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 465 transitions, 8210 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:24,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:24,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:24,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:26,150 INFO L124 PetriNetUnfolderBase]: 3640/5444 cut-off events. [2024-11-27 19:51:26,151 INFO L125 PetriNetUnfolderBase]: For 111404/111404 co-relation queries the response was YES. [2024-11-27 19:51:26,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44977 conditions, 5444 events. 3640/5444 cut-off events. For 111404/111404 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28793 event pairs, 924 based on Foata normal form. 24/5468 useless extension candidates. Maximal degree in co-relation 44702. Up to 3647 conditions per place. [2024-11-27 19:51:26,201 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 433 selfloop transitions, 90 changer transitions 19/543 dead transitions. [2024-11-27 19:51:26,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 543 transitions, 10280 flow [2024-11-27 19:51:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:51:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-11-27 19:51:26,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2024-11-27 19:51:26,202 INFO L175 Difference]: Start difference. First operand has 163 places, 465 transitions, 8210 flow. Second operand 7 states and 96 transitions. [2024-11-27 19:51:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 543 transitions, 10280 flow [2024-11-27 19:51:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 543 transitions, 10088 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:26,851 INFO L231 Difference]: Finished difference. Result has 172 places, 465 transitions, 8333 flow [2024-11-27 19:51:26,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7953, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8333, PETRI_PLACES=172, PETRI_TRANSITIONS=465} [2024-11-27 19:51:26,852 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 144 predicate places. [2024-11-27 19:51:26,852 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 465 transitions, 8333 flow [2024-11-27 19:51:26,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:26,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:26,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:26,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 19:51:27,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:27,055 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)] === [2024-11-27 19:51:27,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 136449778, now seen corresponding path program 5 times [2024-11-27 19:51:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:27,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613565939] [2024-11-27 19:51:27,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:27,068 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:27,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:27,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:27,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613565939] [2024-11-27 19:51:27,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613565939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:27,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:27,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924514919] [2024-11-27 19:51:27,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:27,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:27,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:27,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:27,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:27,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:27,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 465 transitions, 8333 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:29,312 INFO L124 PetriNetUnfolderBase]: 3604/5406 cut-off events. [2024-11-27 19:51:29,312 INFO L125 PetriNetUnfolderBase]: For 107221/107221 co-relation queries the response was YES. [2024-11-27 19:51:29,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44263 conditions, 5406 events. 3604/5406 cut-off events. For 107221/107221 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28683 event pairs, 969 based on Foata normal form. 16/5422 useless extension candidates. Maximal degree in co-relation 44016. Up to 3647 conditions per place. [2024-11-27 19:51:29,388 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 438 selfloop transitions, 70 changer transitions 16/525 dead transitions. [2024-11-27 19:51:29,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 525 transitions, 10087 flow [2024-11-27 19:51:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-27 19:51:29,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-27 19:51:29,389 INFO L175 Difference]: Start difference. First operand has 172 places, 465 transitions, 8333 flow. Second operand 6 states and 90 transitions. [2024-11-27 19:51:29,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 525 transitions, 10087 flow [2024-11-27 19:51:30,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 525 transitions, 9916 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-11-27 19:51:30,202 INFO L231 Difference]: Finished difference. Result has 174 places, 461 transitions, 8260 flow [2024-11-27 19:51:30,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8260, PETRI_PLACES=174, PETRI_TRANSITIONS=461} [2024-11-27 19:51:30,203 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 146 predicate places. [2024-11-27 19:51:30,203 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 461 transitions, 8260 flow [2024-11-27 19:51:30,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:30,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:30,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:30,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 19:51:30,204 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)] === [2024-11-27 19:51:30,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 294555550, now seen corresponding path program 6 times [2024-11-27 19:51:30,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:30,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615043229] [2024-11-27 19:51:30,205 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:30,224 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:51:30,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:30,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615043229] [2024-11-27 19:51:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615043229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431450099] [2024-11-27 19:51:30,525 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:30,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:30,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:30,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:51:30,621 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:51:30,621 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:30,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:51:30,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:30,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:30,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431450099] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:30,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:30,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 15 [2024-11-27 19:51:30,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989959130] [2024-11-27 19:51:30,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:30,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:30,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:30,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:51:30,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 461 transitions, 8260 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:32,186 INFO L124 PetriNetUnfolderBase]: 3607/5403 cut-off events. [2024-11-27 19:51:32,187 INFO L125 PetriNetUnfolderBase]: For 104824/104824 co-relation queries the response was YES. [2024-11-27 19:51:32,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44292 conditions, 5403 events. 3607/5403 cut-off events. For 104824/104824 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28683 event pairs, 753 based on Foata normal form. 24/5427 useless extension candidates. Maximal degree in co-relation 44066. Up to 3024 conditions per place. [2024-11-27 19:51:32,289 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 447 selfloop transitions, 77 changer transitions 2/527 dead transitions. [2024-11-27 19:51:32,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 527 transitions, 10092 flow [2024-11-27 19:51:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-11-27 19:51:32,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-11-27 19:51:32,290 INFO L175 Difference]: Start difference. First operand has 174 places, 461 transitions, 8260 flow. Second operand 6 states and 86 transitions. [2024-11-27 19:51:32,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 527 transitions, 10092 flow [2024-11-27 19:51:33,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 527 transitions, 9942 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-27 19:51:33,112 INFO L231 Difference]: Finished difference. Result has 175 places, 470 transitions, 8504 flow [2024-11-27 19:51:33,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8504, PETRI_PLACES=175, PETRI_TRANSITIONS=470} [2024-11-27 19:51:33,113 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 147 predicate places. [2024-11-27 19:51:33,113 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 470 transitions, 8504 flow [2024-11-27 19:51:33,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:33,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:33,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:33,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:51:33,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:33,314 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)] === [2024-11-27 19:51:33,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1853345624, now seen corresponding path program 7 times [2024-11-27 19:51:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:33,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331535478] [2024-11-27 19:51:33,315 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:33,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331535478] [2024-11-27 19:51:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331535478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571881001] [2024-11-27 19:51:33,468 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:33,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:33,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:33,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:51:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:33,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:51:33,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:33,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:33,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571881001] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:33,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:33,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2024-11-27 19:51:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683001185] [2024-11-27 19:51:33,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:33,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:33,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:33,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:33,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:33,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 470 transitions, 8504 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:33,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:33,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:35,582 INFO L124 PetriNetUnfolderBase]: 3890/5879 cut-off events. [2024-11-27 19:51:35,583 INFO L125 PetriNetUnfolderBase]: For 118767/118767 co-relation queries the response was YES. [2024-11-27 19:51:35,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49051 conditions, 5879 events. 3890/5879 cut-off events. For 118767/118767 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32244 event pairs, 468 based on Foata normal form. 24/5903 useless extension candidates. Maximal degree in co-relation 48766. Up to 1910 conditions per place. [2024-11-27 19:51:35,681 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 394 selfloop transitions, 210 changer transitions 2/607 dead transitions. [2024-11-27 19:51:35,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 607 transitions, 11724 flow [2024-11-27 19:51:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:51:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:51:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-11-27 19:51:35,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-27 19:51:35,683 INFO L175 Difference]: Start difference. First operand has 175 places, 470 transitions, 8504 flow. Second operand 8 states and 124 transitions. [2024-11-27 19:51:35,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 607 transitions, 11724 flow [2024-11-27 19:51:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 607 transitions, 11608 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:36,602 INFO L231 Difference]: Finished difference. Result has 185 places, 521 transitions, 10315 flow [2024-11-27 19:51:36,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8409, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10315, PETRI_PLACES=185, PETRI_TRANSITIONS=521} [2024-11-27 19:51:36,603 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 157 predicate places. [2024-11-27 19:51:36,604 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 521 transitions, 10315 flow [2024-11-27 19:51:36,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:36,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:36,604 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:36,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:36,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 19:51:36,808 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:36,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash -133082321, now seen corresponding path program 4 times [2024-11-27 19:51:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998312224] [2024-11-27 19:51:36,809 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:36,819 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:36,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:36,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:36,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998312224] [2024-11-27 19:51:36,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998312224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:36,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356240188] [2024-11-27 19:51:36,941 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:36,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:36,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:36,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:51:37,042 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:37,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:37,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:51:37,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:37,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:37,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356240188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:37,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:37,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-27 19:51:37,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593955945] [2024-11-27 19:51:37,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:37,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 19:51:37,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:37,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 19:51:37,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:51:37,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:37,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 521 transitions, 10315 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:37,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:37,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:37,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:39,156 INFO L124 PetriNetUnfolderBase]: 3947/5976 cut-off events. [2024-11-27 19:51:39,156 INFO L125 PetriNetUnfolderBase]: For 141542/141542 co-relation queries the response was YES. [2024-11-27 19:51:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51833 conditions, 5976 events. 3947/5976 cut-off events. For 141542/141542 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32989 event pairs, 1072 based on Foata normal form. 21/5997 useless extension candidates. Maximal degree in co-relation 51543. Up to 4158 conditions per place. [2024-11-27 19:51:39,231 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 491 selfloop transitions, 112 changer transitions 5/609 dead transitions. [2024-11-27 19:51:39,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 609 transitions, 12629 flow [2024-11-27 19:51:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:51:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 19:51:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-11-27 19:51:39,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-11-27 19:51:39,232 INFO L175 Difference]: Start difference. First operand has 185 places, 521 transitions, 10315 flow. Second operand 10 states and 126 transitions. [2024-11-27 19:51:39,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 609 transitions, 12629 flow [2024-11-27 19:51:40,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 609 transitions, 12563 flow, removed 33 selfloop flow, removed 0 redundant places. [2024-11-27 19:51:40,355 INFO L231 Difference]: Finished difference. Result has 198 places, 539 transitions, 10908 flow [2024-11-27 19:51:40,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10255, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10908, PETRI_PLACES=198, PETRI_TRANSITIONS=539} [2024-11-27 19:51:40,356 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 170 predicate places. [2024-11-27 19:51:40,356 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 539 transitions, 10908 flow [2024-11-27 19:51:40,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:40,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:40,356 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:40,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 19:51:40,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:40,557 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:40,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 512303215, now seen corresponding path program 5 times [2024-11-27 19:51:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903436432] [2024-11-27 19:51:40,558 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:40,573 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:40,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:40,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903436432] [2024-11-27 19:51:40,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903436432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:40,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423829304] [2024-11-27 19:51:40,822 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:40,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:40,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:40,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:51:40,907 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:40,907 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:40,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:40,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:41,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423829304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:41,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-27 19:51:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314952177] [2024-11-27 19:51:41,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:41,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:51:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:41,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:51:41,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:51:41,354 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:41,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 539 transitions, 10908 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:41,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:41,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:41,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:43,722 INFO L124 PetriNetUnfolderBase]: 3981/6023 cut-off events. [2024-11-27 19:51:43,723 INFO L125 PetriNetUnfolderBase]: For 149010/149010 co-relation queries the response was YES. [2024-11-27 19:51:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53266 conditions, 6023 events. 3981/6023 cut-off events. For 149010/149010 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33573 event pairs, 636 based on Foata normal form. 25/6048 useless extension candidates. Maximal degree in co-relation 52967. Up to 2324 conditions per place. [2024-11-27 19:51:43,798 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 618 selfloop transitions, 177 changer transitions 5/801 dead transitions. [2024-11-27 19:51:43,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 801 transitions, 16792 flow [2024-11-27 19:51:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:51:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 19:51:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 256 transitions. [2024-11-27 19:51:43,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46545454545454545 [2024-11-27 19:51:43,800 INFO L175 Difference]: Start difference. First operand has 198 places, 539 transitions, 10908 flow. Second operand 22 states and 256 transitions. [2024-11-27 19:51:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 801 transitions, 16792 flow [2024-11-27 19:51:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 801 transitions, 16637 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:44,885 INFO L231 Difference]: Finished difference. Result has 229 places, 575 transitions, 11917 flow [2024-11-27 19:51:44,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10757, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11917, PETRI_PLACES=229, PETRI_TRANSITIONS=575} [2024-11-27 19:51:44,886 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2024-11-27 19:51:44,886 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 575 transitions, 11917 flow [2024-11-27 19:51:44,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:44,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:44,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:44,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:45,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 19:51:45,087 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:45,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash -592003780, now seen corresponding path program 8 times [2024-11-27 19:51:45,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:45,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804861881] [2024-11-27 19:51:45,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:45,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:45,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:45,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804861881] [2024-11-27 19:51:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804861881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177539481] [2024-11-27 19:51:45,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:45,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:45,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:45,275 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 19:51:45,341 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:45,342 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:45,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:51:45,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:45,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177539481] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:45,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 14 [2024-11-27 19:51:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130661624] [2024-11-27 19:51:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:45,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:51:45,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:45,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:51:45,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:51:45,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:45,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 575 transitions, 11917 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:45,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:45,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:45,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:47,013 INFO L124 PetriNetUnfolderBase]: 3955/5997 cut-off events. [2024-11-27 19:51:47,014 INFO L125 PetriNetUnfolderBase]: For 156178/156178 co-relation queries the response was YES. [2024-11-27 19:51:47,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54947 conditions, 5997 events. 3955/5997 cut-off events. For 156178/156178 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33290 event pairs, 800 based on Foata normal form. 26/6023 useless extension candidates. Maximal degree in co-relation 54702. Up to 3352 conditions per place. [2024-11-27 19:51:47,115 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 524 selfloop transitions, 104 changer transitions 2/631 dead transitions. [2024-11-27 19:51:47,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 631 transitions, 13785 flow [2024-11-27 19:51:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-27 19:51:47,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-27 19:51:47,117 INFO L175 Difference]: Start difference. First operand has 229 places, 575 transitions, 11917 flow. Second operand 6 states and 87 transitions. [2024-11-27 19:51:47,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 631 transitions, 13785 flow [2024-11-27 19:51:48,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 631 transitions, 13510 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-11-27 19:51:48,788 INFO L231 Difference]: Finished difference. Result has 229 places, 575 transitions, 11887 flow [2024-11-27 19:51:48,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11887, PETRI_PLACES=229, PETRI_TRANSITIONS=575} [2024-11-27 19:51:48,789 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2024-11-27 19:51:48,789 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 575 transitions, 11887 flow [2024-11-27 19:51:48,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:48,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:48,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 19:51:48,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:48,990 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:48,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1244768324, now seen corresponding path program 9 times [2024-11-27 19:51:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:48,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953415593] [2024-11-27 19:51:48,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:49,005 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:49,005 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953415593] [2024-11-27 19:51:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953415593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214649393] [2024-11-27 19:51:49,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:49,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:49,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:49,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 19:51:49,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:51:49,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:49,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:51:49,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214649393] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:49,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:49,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 15 [2024-11-27 19:51:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863194162] [2024-11-27 19:51:49,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:49,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:49,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:49,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:51:49,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:49,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 575 transitions, 11887 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:49,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:49,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:49,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:51,711 INFO L124 PetriNetUnfolderBase]: 3931/5950 cut-off events. [2024-11-27 19:51:51,711 INFO L125 PetriNetUnfolderBase]: For 155192/155192 co-relation queries the response was YES. [2024-11-27 19:51:51,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 5950 events. 3931/5950 cut-off events. For 155192/155192 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32916 event pairs, 817 based on Foata normal form. 24/5974 useless extension candidates. Maximal degree in co-relation 54303. Up to 3243 conditions per place. [2024-11-27 19:51:51,783 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 443 selfloop transitions, 176 changer transitions 2/622 dead transitions. [2024-11-27 19:51:51,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 622 transitions, 13705 flow [2024-11-27 19:51:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-11-27 19:51:51,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-27 19:51:51,784 INFO L175 Difference]: Start difference. First operand has 229 places, 575 transitions, 11887 flow. Second operand 6 states and 85 transitions. [2024-11-27 19:51:51,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 622 transitions, 13705 flow [2024-11-27 19:51:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 622 transitions, 13575 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-27 19:51:52,986 INFO L231 Difference]: Finished difference. Result has 234 places, 577 transitions, 12348 flow [2024-11-27 19:51:52,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11759, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12348, PETRI_PLACES=234, PETRI_TRANSITIONS=577} [2024-11-27 19:51:52,987 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 206 predicate places. [2024-11-27 19:51:52,987 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 577 transitions, 12348 flow [2024-11-27 19:51:52,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:52,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:52,987 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:52,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 19:51:53,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:53,188 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:53,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -704843940, now seen corresponding path program 10 times [2024-11-27 19:51:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242396933] [2024-11-27 19:51:53,189 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:53,198 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:53,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242396933] [2024-11-27 19:51:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242396933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945305532] [2024-11-27 19:51:53,414 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:53,417 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:53,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 19:51:53,489 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:53,489 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:53,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:51:53,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:53,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945305532] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:54,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 13 [2024-11-27 19:51:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854087787] [2024-11-27 19:51:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:54,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:54,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:54,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:51:54,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:54,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 577 transitions, 12348 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:54,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:54,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:54,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:55,468 INFO L124 PetriNetUnfolderBase]: 3901/5856 cut-off events. [2024-11-27 19:51:55,469 INFO L125 PetriNetUnfolderBase]: For 158082/158082 co-relation queries the response was YES. [2024-11-27 19:51:55,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55360 conditions, 5856 events. 3901/5856 cut-off events. For 158082/158082 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31847 event pairs, 815 based on Foata normal form. 26/5882 useless extension candidates. Maximal degree in co-relation 55125. Up to 3208 conditions per place. [2024-11-27 19:51:55,538 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 441 selfloop transitions, 166 changer transitions 2/610 dead transitions. [2024-11-27 19:51:55,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 610 transitions, 13880 flow [2024-11-27 19:51:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:51:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-11-27 19:51:55,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-11-27 19:51:55,539 INFO L175 Difference]: Start difference. First operand has 234 places, 577 transitions, 12348 flow. Second operand 6 states and 86 transitions. [2024-11-27 19:51:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 610 transitions, 13880 flow [2024-11-27 19:51:56,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 610 transitions, 13828 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:56,683 INFO L231 Difference]: Finished difference. Result has 235 places, 568 transitions, 12479 flow [2024-11-27 19:51:56,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12147, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12479, PETRI_PLACES=235, PETRI_TRANSITIONS=568} [2024-11-27 19:51:56,683 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 207 predicate places. [2024-11-27 19:51:56,683 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 568 transitions, 12479 flow [2024-11-27 19:51:56,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:56,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:56,684 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:56,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 19:51:56,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 19:51:56,884 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:56,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -394869174, now seen corresponding path program 11 times [2024-11-27 19:51:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:56,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805981335] [2024-11-27 19:51:56,885 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:56,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:56,894 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:56,894 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805981335] [2024-11-27 19:51:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805981335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422259967] [2024-11-27 19:51:57,033 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:57,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:57,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 19:51:57,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:57,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:57,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:51:57,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:57,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422259967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:57,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2024-11-27 19:51:57,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139510702] [2024-11-27 19:51:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:57,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:51:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:57,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:51:57,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:51:57,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:51:57,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 568 transitions, 12479 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:57,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:57,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:51:57,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:59,884 INFO L124 PetriNetUnfolderBase]: 4423/6705 cut-off events. [2024-11-27 19:51:59,884 INFO L125 PetriNetUnfolderBase]: For 185250/185250 co-relation queries the response was YES. [2024-11-27 19:51:59,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63553 conditions, 6705 events. 4423/6705 cut-off events. For 185250/185250 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 38138 event pairs, 609 based on Foata normal form. 18/6723 useless extension candidates. Maximal degree in co-relation 63319. Up to 2475 conditions per place. [2024-11-27 19:51:59,984 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 377 selfloop transitions, 459 changer transitions 8/845 dead transitions. [2024-11-27 19:51:59,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 845 transitions, 18973 flow [2024-11-27 19:51:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 19:51:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 19:51:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 265 transitions. [2024-11-27 19:51:59,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-11-27 19:51:59,986 INFO L175 Difference]: Start difference. First operand has 235 places, 568 transitions, 12479 flow. Second operand 21 states and 265 transitions. [2024-11-27 19:51:59,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 845 transitions, 18973 flow [2024-11-27 19:52:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 845 transitions, 18611 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 19:52:01,747 INFO L231 Difference]: Finished difference. Result has 260 places, 700 transitions, 16631 flow [2024-11-27 19:52:01,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12143, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16631, PETRI_PLACES=260, PETRI_TRANSITIONS=700} [2024-11-27 19:52:01,748 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 232 predicate places. [2024-11-27 19:52:01,749 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 700 transitions, 16631 flow [2024-11-27 19:52:01,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:01,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:01,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:01,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 19:52:01,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-27 19:52:01,953 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:01,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1640295728, now seen corresponding path program 12 times [2024-11-27 19:52:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:01,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036744859] [2024-11-27 19:52:01,954 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:01,964 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:52:01,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:02,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:02,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036744859] [2024-11-27 19:52:02,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036744859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:02,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884274368] [2024-11-27 19:52:02,151 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:02,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:02,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:02,154 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:02,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 19:52:02,240 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:52:02,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:02,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:52:02,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:02,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884274368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:02,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:02,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-11-27 19:52:02,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523517383] [2024-11-27 19:52:02,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:02,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:52:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:02,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:52:02,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:52:02,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:52:02,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 700 transitions, 16631 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:52:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:05,962 INFO L124 PetriNetUnfolderBase]: 5315/7936 cut-off events. [2024-11-27 19:52:05,962 INFO L125 PetriNetUnfolderBase]: For 277192/277192 co-relation queries the response was YES. [2024-11-27 19:52:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82450 conditions, 7936 events. 5315/7936 cut-off events. For 277192/277192 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 45261 event pairs, 1068 based on Foata normal form. 37/7973 useless extension candidates. Maximal degree in co-relation 82192. Up to 5935 conditions per place. [2024-11-27 19:52:06,112 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 667 selfloop transitions, 396 changer transitions 3/1067 dead transitions. [2024-11-27 19:52:06,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1067 transitions, 26681 flow [2024-11-27 19:52:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 19:52:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 19:52:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 249 transitions. [2024-11-27 19:52:06,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-11-27 19:52:06,114 INFO L175 Difference]: Start difference. First operand has 260 places, 700 transitions, 16631 flow. Second operand 21 states and 249 transitions. [2024-11-27 19:52:06,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1067 transitions, 26681 flow [2024-11-27 19:52:09,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1067 transitions, 25979 flow, removed 329 selfloop flow, removed 1 redundant places. [2024-11-27 19:52:09,835 INFO L231 Difference]: Finished difference. Result has 293 places, 916 transitions, 23403 flow [2024-11-27 19:52:09,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=16113, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23403, PETRI_PLACES=293, PETRI_TRANSITIONS=916} [2024-11-27 19:52:09,837 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 265 predicate places. [2024-11-27 19:52:09,837 INFO L471 AbstractCegarLoop]: Abstraction has has 293 places, 916 transitions, 23403 flow [2024-11-27 19:52:09,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:09,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:09,838 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:09,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 19:52:10,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:10,039 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:10,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 758535484, now seen corresponding path program 13 times [2024-11-27 19:52:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859137605] [2024-11-27 19:52:10,040 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:52:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:10,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859137605] [2024-11-27 19:52:10,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859137605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:10,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429178261] [2024-11-27 19:52:10,211 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:52:10,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:10,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:10,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 19:52:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:10,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:52:10,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:10,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429178261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:11,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-27 19:52:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251399001] [2024-11-27 19:52:11,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:11,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:52:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:11,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:52:11,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:52:11,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:52:11,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 916 transitions, 23403 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:11,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:11,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:52:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:17,587 INFO L124 PetriNetUnfolderBase]: 6877/10418 cut-off events. [2024-11-27 19:52:17,587 INFO L125 PetriNetUnfolderBase]: For 391990/391990 co-relation queries the response was YES. [2024-11-27 19:52:17,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112292 conditions, 10418 events. 6877/10418 cut-off events. For 391990/391990 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 63783 event pairs, 918 based on Foata normal form. 53/10471 useless extension candidates. Maximal degree in co-relation 112087. Up to 4528 conditions per place. [2024-11-27 19:52:17,999 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 689 selfloop transitions, 766 changer transitions 3/1459 dead transitions. [2024-11-27 19:52:17,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1459 transitions, 37171 flow [2024-11-27 19:52:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 19:52:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 19:52:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 356 transitions. [2024-11-27 19:52:18,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5274074074074074 [2024-11-27 19:52:18,002 INFO L175 Difference]: Start difference. First operand has 293 places, 916 transitions, 23403 flow. Second operand 27 states and 356 transitions. [2024-11-27 19:52:18,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1459 transitions, 37171 flow [2024-11-27 19:52:22,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1459 transitions, 35723 flow, removed 667 selfloop flow, removed 6 redundant places. [2024-11-27 19:52:22,952 INFO L231 Difference]: Finished difference. Result has 327 places, 1197 transitions, 32130 flow [2024-11-27 19:52:22,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=22172, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=32130, PETRI_PLACES=327, PETRI_TRANSITIONS=1197} [2024-11-27 19:52:22,954 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 299 predicate places. [2024-11-27 19:52:22,954 INFO L471 AbstractCegarLoop]: Abstraction has has 327 places, 1197 transitions, 32130 flow [2024-11-27 19:52:22,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:22,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:22,954 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:22,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:23,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 19:52:23,155 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:23,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1182998928, now seen corresponding path program 14 times [2024-11-27 19:52:23,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:23,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379030394] [2024-11-27 19:52:23,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:23,174 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:23,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:23,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:23,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379030394] [2024-11-27 19:52:23,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379030394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495729288] [2024-11-27 19:52:23,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:23,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:23,384 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:23,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 19:52:23,472 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:23,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:23,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:52:23,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:23,543 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495729288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:23,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:52:23,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2024-11-27 19:52:23,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226010247] [2024-11-27 19:52:23,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:23,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:52:23,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:23,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:52:23,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:52:23,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:52:23,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1197 transitions, 32130 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:23,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:23,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:52:23,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:28,660 INFO L124 PetriNetUnfolderBase]: 6900/10451 cut-off events. [2024-11-27 19:52:28,661 INFO L125 PetriNetUnfolderBase]: For 416671/416671 co-relation queries the response was YES. [2024-11-27 19:52:28,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117143 conditions, 10451 events. 6900/10451 cut-off events. For 416671/416671 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 63816 event pairs, 1858 based on Foata normal form. 2/10453 useless extension candidates. Maximal degree in co-relation 116775. Up to 9746 conditions per place. [2024-11-27 19:52:28,951 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1120 selfloop transitions, 114 changer transitions 5/1240 dead transitions. [2024-11-27 19:52:28,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1240 transitions, 35399 flow [2024-11-27 19:52:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:52:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:52:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-11-27 19:52:28,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2024-11-27 19:52:28,952 INFO L175 Difference]: Start difference. First operand has 327 places, 1197 transitions, 32130 flow. Second operand 7 states and 82 transitions. [2024-11-27 19:52:28,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1240 transitions, 35399 flow [2024-11-27 19:52:35,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1240 transitions, 34210 flow, removed 460 selfloop flow, removed 5 redundant places. [2024-11-27 19:52:35,816 INFO L231 Difference]: Finished difference. Result has 330 places, 1205 transitions, 31558 flow [2024-11-27 19:52:35,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=31122, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=31558, PETRI_PLACES=330, PETRI_TRANSITIONS=1205} [2024-11-27 19:52:35,818 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 302 predicate places. [2024-11-27 19:52:35,818 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1205 transitions, 31558 flow [2024-11-27 19:52:35,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:35,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:35,818 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:35,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 19:52:36,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-27 19:52:36,019 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:36,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -931407420, now seen corresponding path program 15 times [2024-11-27 19:52:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:36,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137237143] [2024-11-27 19:52:36,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:52:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:36,036 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:52:36,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137237143] [2024-11-27 19:52:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137237143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101843520] [2024-11-27 19:52:36,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:52:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:36,264 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:36,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 19:52:36,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:52:36,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:36,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:52:36,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:36,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101843520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:37,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2024-11-27 19:52:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671969891] [2024-11-27 19:52:37,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:37,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:52:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:37,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:52:37,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:52:37,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:52:37,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1205 transitions, 31558 flow. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:52:37,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:44,570 INFO L124 PetriNetUnfolderBase]: 7332/11368 cut-off events. [2024-11-27 19:52:44,570 INFO L125 PetriNetUnfolderBase]: For 404096/404096 co-relation queries the response was YES. [2024-11-27 19:52:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121060 conditions, 11368 events. 7332/11368 cut-off events. For 404096/404096 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 73475 event pairs, 1199 based on Foata normal form. 30/11398 useless extension candidates. Maximal degree in co-relation 120663. Up to 5588 conditions per place. [2024-11-27 19:52:44,842 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 669 selfloop transitions, 826 changer transitions 4/1500 dead transitions. [2024-11-27 19:52:44,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1500 transitions, 40029 flow [2024-11-27 19:52:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 19:52:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-27 19:52:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 253 transitions. [2024-11-27 19:52:44,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506 [2024-11-27 19:52:44,845 INFO L175 Difference]: Start difference. First operand has 330 places, 1205 transitions, 31558 flow. Second operand 20 states and 253 transitions. [2024-11-27 19:52:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1500 transitions, 40029 flow [2024-11-27 19:52:51,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1500 transitions, 39881 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-27 19:52:51,614 INFO L231 Difference]: Finished difference. Result has 354 places, 1333 transitions, 37174 flow [2024-11-27 19:52:51,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=31392, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37174, PETRI_PLACES=354, PETRI_TRANSITIONS=1333} [2024-11-27 19:52:51,615 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 326 predicate places. [2024-11-27 19:52:51,615 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 1333 transitions, 37174 flow [2024-11-27 19:52:51,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 17 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:51,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:51,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:51,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 19:52:51,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-27 19:52:51,817 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:51,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:51,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1944570118, now seen corresponding path program 6 times [2024-11-27 19:52:51,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:51,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041982752] [2024-11-27 19:52:51,818 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:51,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:51,826 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:52:51,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:52,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041982752] [2024-11-27 19:52:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041982752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554470636] [2024-11-27 19:52:52,008 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:52,011 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 19:52:52,109 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:52:52,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:52,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:52:52,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:52,186 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554470636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:52,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:52:52,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2024-11-27 19:52:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823395382] [2024-11-27 19:52:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:52,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:52:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:52,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:52:52,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:52:52,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:52:52,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1333 transitions, 37174 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:52,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:52,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:52:52,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:58,787 INFO L124 PetriNetUnfolderBase]: 7332/11406 cut-off events. [2024-11-27 19:52:58,787 INFO L125 PetriNetUnfolderBase]: For 445219/445219 co-relation queries the response was YES. [2024-11-27 19:52:58,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126722 conditions, 11406 events. 7332/11406 cut-off events. For 445219/445219 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 74053 event pairs, 1974 based on Foata normal form. 24/11430 useless extension candidates. Maximal degree in co-relation 126317. Up to 10541 conditions per place. [2024-11-27 19:52:59,005 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 1254 selfloop transitions, 111 changer transitions 14/1380 dead transitions. [2024-11-27 19:52:59,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1380 transitions, 40426 flow [2024-11-27 19:52:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:52:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:52:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-27 19:52:59,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-11-27 19:52:59,007 INFO L175 Difference]: Start difference. First operand has 354 places, 1333 transitions, 37174 flow. Second operand 7 states and 94 transitions. [2024-11-27 19:52:59,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1380 transitions, 40426 flow [2024-11-27 19:53:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1380 transitions, 39994 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-11-27 19:53:06,911 INFO L231 Difference]: Finished difference. Result has 357 places, 1333 transitions, 37009 flow [2024-11-27 19:53:06,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36711, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37009, PETRI_PLACES=357, PETRI_TRANSITIONS=1333} [2024-11-27 19:53:06,912 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 329 predicate places. [2024-11-27 19:53:06,912 INFO L471 AbstractCegarLoop]: Abstraction has has 357 places, 1333 transitions, 37009 flow [2024-11-27 19:53:06,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:06,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:06,912 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:06,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 19:53:07,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 19:53:07,113 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:07,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1041088108, now seen corresponding path program 16 times [2024-11-27 19:53:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:07,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812921696] [2024-11-27 19:53:07,114 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:53:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:07,123 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:53:07,123 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:07,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812921696] [2024-11-27 19:53:07,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812921696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:07,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:53:07,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:53:07,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516580671] [2024-11-27 19:53:07,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:07,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:53:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:07,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:53:07,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:53:07,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:53:07,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1333 transitions, 37009 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:07,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:07,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:53:07,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:14,103 INFO L124 PetriNetUnfolderBase]: 7323/11383 cut-off events. [2024-11-27 19:53:14,103 INFO L125 PetriNetUnfolderBase]: For 433881/433881 co-relation queries the response was YES. [2024-11-27 19:53:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125229 conditions, 11383 events. 7323/11383 cut-off events. For 433881/433881 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 73641 event pairs, 1786 based on Foata normal form. 2/11385 useless extension candidates. Maximal degree in co-relation 124902. Up to 9016 conditions per place. [2024-11-27 19:53:14,315 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1269 selfloop transitions, 112 changer transitions 5/1387 dead transitions. [2024-11-27 19:53:14,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1387 transitions, 40456 flow [2024-11-27 19:53:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:53:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 19:53:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-11-27 19:53:14,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-11-27 19:53:14,316 INFO L175 Difference]: Start difference. First operand has 357 places, 1333 transitions, 37009 flow. Second operand 9 states and 115 transitions. [2024-11-27 19:53:14,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1387 transitions, 40456 flow [2024-11-27 19:53:21,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1387 transitions, 40210 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-27 19:53:21,918 INFO L231 Difference]: Finished difference. Result has 362 places, 1340 transitions, 37199 flow [2024-11-27 19:53:21,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36774, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=37199, PETRI_PLACES=362, PETRI_TRANSITIONS=1340} [2024-11-27 19:53:21,919 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 334 predicate places. [2024-11-27 19:53:21,920 INFO L471 AbstractCegarLoop]: Abstraction has has 362 places, 1340 transitions, 37199 flow [2024-11-27 19:53:21,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:21,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:21,920 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:21,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-27 19:53:21,920 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:21,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 503232530, now seen corresponding path program 17 times [2024-11-27 19:53:21,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:21,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646924652] [2024-11-27 19:53:21,921 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:53:21,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:21,931 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:21,931 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:22,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:22,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646924652] [2024-11-27 19:53:22,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646924652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:22,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116062464] [2024-11-27 19:53:22,087 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:53:22,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:22,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:22,089 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:22,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 19:53:22,178 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:22,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:22,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:53:22,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:22,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:53:22,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116062464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:22,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:53:22,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2024-11-27 19:53:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819173834] [2024-11-27 19:53:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:22,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:53:22,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:22,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:53:22,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:53:22,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:53:22,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1340 transitions, 37199 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:22,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:22,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:53:22,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:29,376 INFO L124 PetriNetUnfolderBase]: 7321/11381 cut-off events. [2024-11-27 19:53:29,376 INFO L125 PetriNetUnfolderBase]: For 434309/434309 co-relation queries the response was YES. [2024-11-27 19:53:29,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125219 conditions, 11381 events. 7321/11381 cut-off events. For 434309/434309 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 73791 event pairs, 1986 based on Foata normal form. 2/11383 useless extension candidates. Maximal degree in co-relation 124783. Up to 10649 conditions per place. [2024-11-27 19:53:29,581 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1244 selfloop transitions, 115 changer transitions 5/1365 dead transitions. [2024-11-27 19:53:29,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1365 transitions, 40189 flow [2024-11-27 19:53:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:53:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:53:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-11-27 19:53:29,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-11-27 19:53:29,582 INFO L175 Difference]: Start difference. First operand has 362 places, 1340 transitions, 37199 flow. Second operand 7 states and 85 transitions. [2024-11-27 19:53:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1365 transitions, 40189 flow [2024-11-27 19:53:36,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1365 transitions, 40028 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 19:53:36,615 INFO L231 Difference]: Finished difference. Result has 366 places, 1342 transitions, 37333 flow [2024-11-27 19:53:36,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=37041, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37333, PETRI_PLACES=366, PETRI_TRANSITIONS=1342} [2024-11-27 19:53:36,617 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 338 predicate places. [2024-11-27 19:53:36,617 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 1342 transitions, 37333 flow [2024-11-27 19:53:36,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:36,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:36,617 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:36,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 19:53:36,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 19:53:36,818 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:36,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1770744250, now seen corresponding path program 18 times [2024-11-27 19:53:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745570064] [2024-11-27 19:53:36,818 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:53:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:36,828 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:53:36,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745570064] [2024-11-27 19:53:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745570064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578791903] [2024-11-27 19:53:37,004 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:53:37,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:37,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:37,006 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:37,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 19:53:37,092 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:53:37,092 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:37,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:53:37,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:37,140 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:53:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578791903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:37,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:53:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2024-11-27 19:53:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579174615] [2024-11-27 19:53:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:37,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:53:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:37,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:53:37,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:53:37,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:53:37,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1342 transitions, 37333 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:37,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:37,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:53:37,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:44,091 INFO L124 PetriNetUnfolderBase]: 7319/11379 cut-off events. [2024-11-27 19:53:44,092 INFO L125 PetriNetUnfolderBase]: For 432116/432116 co-relation queries the response was YES. [2024-11-27 19:53:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125430 conditions, 11379 events. 7319/11379 cut-off events. For 432116/432116 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 73778 event pairs, 1999 based on Foata normal form. 2/11381 useless extension candidates. Maximal degree in co-relation 124989. Up to 10649 conditions per place. [2024-11-27 19:53:44,362 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1239 selfloop transitions, 124 changer transitions 5/1369 dead transitions. [2024-11-27 19:53:44,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1369 transitions, 40393 flow [2024-11-27 19:53:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:53:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:53:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-11-27 19:53:44,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-11-27 19:53:44,364 INFO L175 Difference]: Start difference. First operand has 366 places, 1342 transitions, 37333 flow. Second operand 7 states and 83 transitions. [2024-11-27 19:53:44,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1369 transitions, 40393 flow [2024-11-27 19:53:52,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1369 transitions, 40259 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:53:52,255 INFO L231 Difference]: Finished difference. Result has 371 places, 1344 transitions, 37559 flow [2024-11-27 19:53:52,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=37202, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37559, PETRI_PLACES=371, PETRI_TRANSITIONS=1344} [2024-11-27 19:53:52,256 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 343 predicate places. [2024-11-27 19:53:52,257 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 1344 transitions, 37559 flow [2024-11-27 19:53:52,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:52,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:52,257 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:52,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 19:53:52,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:52,458 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:52,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1986367468, now seen corresponding path program 19 times [2024-11-27 19:53:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:52,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884688180] [2024-11-27 19:53:52,459 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:53:52,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884688180] [2024-11-27 19:53:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884688180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:52,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:53:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:53:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196708222] [2024-11-27 19:53:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:52,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:53:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:52,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:53:52,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:53:52,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:53:52,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1344 transitions, 37559 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:53:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:59,399 INFO L124 PetriNetUnfolderBase]: 7312/11352 cut-off events. [2024-11-27 19:53:59,400 INFO L125 PetriNetUnfolderBase]: For 436870/436870 co-relation queries the response was YES. [2024-11-27 19:53:59,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125501 conditions, 11352 events. 7312/11352 cut-off events. For 436870/436870 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 73419 event pairs, 1996 based on Foata normal form. 2/11354 useless extension candidates. Maximal degree in co-relation 125057. Up to 10627 conditions per place. [2024-11-27 19:53:59,606 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1240 selfloop transitions, 121 changer transitions 5/1367 dead transitions. [2024-11-27 19:53:59,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1367 transitions, 40500 flow [2024-11-27 19:53:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:53:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:53:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-11-27 19:53:59,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-11-27 19:53:59,607 INFO L175 Difference]: Start difference. First operand has 371 places, 1344 transitions, 37559 flow. Second operand 7 states and 83 transitions. [2024-11-27 19:53:59,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1367 transitions, 40500 flow [2024-11-27 19:54:06,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1367 transitions, 40402 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 19:54:06,792 INFO L231 Difference]: Finished difference. Result has 375 places, 1342 transitions, 37648 flow [2024-11-27 19:54:06,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=37422, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37648, PETRI_PLACES=375, PETRI_TRANSITIONS=1342} [2024-11-27 19:54:06,794 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 347 predicate places. [2024-11-27 19:54:06,794 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 1342 transitions, 37648 flow [2024-11-27 19:54:06,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:06,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:06,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:06,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-27 19:54:06,795 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:06,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1563119961, now seen corresponding path program 6 times [2024-11-27 19:54:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862017891] [2024-11-27 19:54:06,795 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:54:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:06,804 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:54:06,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:54:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862017891] [2024-11-27 19:54:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862017891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25530670] [2024-11-27 19:54:06,977 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:54:06,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:06,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:06,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72fb0780-0731-4324-9cdc-3fd948fed22d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 19:54:07,056 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:54:07,056 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:07,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:54:07,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:54:07,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:54:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25530670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:07,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-27 19:54:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341295989] [2024-11-27 19:54:07,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:07,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:54:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:07,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:54:07,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:54:07,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-11-27 19:54:07,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1342 transitions, 37648 flow. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:07,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:07,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-11-27 19:54:07,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand