./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-theta/unwind3-100.i --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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-theta/unwind3-100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/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 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:09:12,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:09:12,783 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:09:12,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:09:12,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:09:12,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:09:12,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:09:12,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:09:12,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:09:12,847 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:09:12,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:09:12,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:09:12,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:09:12,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:09:12,851 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:09:12,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:09:12,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:09:12,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:09:12,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:09:12,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:09:12,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:09:12,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:09:12,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:09:12,854 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:09:12,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:12,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:12,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:12,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:12,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:09:12,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:12,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:12,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:12,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:12,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:09:12,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:09:12,856 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:09:12,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:09:12,858 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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/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 -> 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 [2024-11-27 20:09:13,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:09:13,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:09:13,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:09:13,284 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:09:13,285 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:09:13,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-27 20:09:16,936 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/data/3f818d2ea/4ae3b0c4d46941c9bfbba58370ca6122/FLAG88715f2c8 [2024-11-27 20:09:17,358 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:09:17,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-27 20:09:17,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/data/3f818d2ea/4ae3b0c4d46941c9bfbba58370ca6122/FLAG88715f2c8 [2024-11-27 20:09:17,544 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/data/3f818d2ea/4ae3b0c4d46941c9bfbba58370ca6122 [2024-11-27 20:09:17,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:09:17,550 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:09:17,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:17,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:09:17,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:09:17,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:17" (1/1) ... [2024-11-27 20:09:17,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2511d8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:17, skipping insertion in model container [2024-11-27 20:09:17,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:17" (1/1) ... [2024-11-27 20:09:17,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:09:18,170 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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/sv-benchmarks/c/pthread-theta/unwind3-100.i[33026,33039] [2024-11-27 20:09:18,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:18,221 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:09:18,311 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_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/sv-benchmarks/c/pthread-theta/unwind3-100.i[33026,33039] [2024-11-27 20:09:18,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:18,372 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:09:18,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18 WrapperNode [2024-11-27 20:09:18,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:18,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:18,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:09:18,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:09:18,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,442 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-11-27 20:09:18,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:18,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:09:18,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:09:18,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:09:18,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,487 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 20:09:18,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,499 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,506 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,507 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:09:18,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:09:18,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:09:18,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:09:18,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (1/1) ... [2024-11-27 20:09:18,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:18,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:09:18,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7970d684-5bb8-4cf6-b9c2-f98151fabd9b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:09:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:09:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-27 20:09:18,611 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-27 20:09:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-27 20:09:18,612 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-27 20:09:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:09:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:09:18,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:09:18,614 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 20:09:18,819 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:09:18,822 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:09:19,040 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:09:19,041 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:09:19,226 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:09:19,227 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 20:09:19,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:19 BoogieIcfgContainer [2024-11-27 20:09:19,228 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:09:19,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:09:19,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:09:19,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:09:19,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:09:17" (1/3) ... [2024-11-27 20:09:19,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533eeffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:19, skipping insertion in model container [2024-11-27 20:09:19,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:18" (2/3) ... [2024-11-27 20:09:19,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533eeffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:19, skipping insertion in model container [2024-11-27 20:09:19,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:19" (3/3) ... [2024-11-27 20:09:19,247 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind3-100.i [2024-11-27 20:09:19,273 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:09:19,275 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind3-100.i that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 20:09:19,275 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:09:19,356 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:19,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2024-11-27 20:09:19,476 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-27 20:09:19,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:09:19,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 18. Up to 4 conditions per place. [2024-11-27 20:09:19,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2024-11-27 20:09:19,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2024-11-27 20:09:19,506 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:19,529 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;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:19,530 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 20:09:19,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:19,544 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-27 20:09:19,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:09:19,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:19,546 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:19,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 20:09:19,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1456018350, now seen corresponding path program 1 times [2024-11-27 20:09:19,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:19,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568000816] [2024-11-27 20:09:19,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:19,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:19,710 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:09:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:19,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:09:19,774 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:09:19,776 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-27 20:09:19,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-27 20:09:19,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-27 20:09:19,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-27 20:09:19,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:09:19,780 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2024-11-27 20:09:19,786 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:09:19,786 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-27 20:09:19,837 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:19,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 90 flow [2024-11-27 20:09:19,878 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-27 20:09:19,879 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:09:19,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 50 events. 6/50 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 61. Up to 6 conditions per place. [2024-11-27 20:09:19,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 90 flow [2024-11-27 20:09:19,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 57 flow [2024-11-27 20:09:19,885 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:19,889 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;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:19,889 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-27 20:09:19,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:19,914 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-27 20:09:19,914 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:09:19,915 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:19,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:19,915 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-27 20:09:19,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1916292406, now seen corresponding path program 1 times [2024-11-27 20:09:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015783644] [2024-11-27 20:09:19,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:20,133 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 20:09:20,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015783644] [2024-11-27 20:09:20,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015783644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:20,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:20,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:20,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108853941] [2024-11-27 20:09:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:20,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:20,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:20,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:20,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-11-27 20:09:20,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:20,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:20,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-11-27 20:09:20,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:20,415 INFO L124 PetriNetUnfolderBase]: 180/365 cut-off events. [2024-11-27 20:09:20,415 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-27 20:09:20,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 365 events. 180/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1626 event pairs, 78 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 223. Up to 298 conditions per place. [2024-11-27 20:09:20,422 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-27 20:09:20,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 105 flow [2024-11-27 20:09:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-27 20:09:20,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-27 20:09:20,449 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 57 flow. Second operand 4 states and 65 transitions. [2024-11-27 20:09:20,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 105 flow [2024-11-27 20:09:20,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:20,463 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 70 flow [2024-11-27 20:09:20,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2024-11-27 20:09:20,472 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-27 20:09:20,472 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 70 flow [2024-11-27 20:09:20,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:20,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:20,474 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:20,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:09:20,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-27 20:09:20,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -588305996, now seen corresponding path program 1 times [2024-11-27 20:09:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72746399] [2024-11-27 20:09:20,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:20,531 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:09:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:20,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:09:20,568 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:09:20,568 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-27 20:09:20,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-27 20:09:20,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-27 20:09:20,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-27 20:09:20,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-27 20:09:20,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:09:20,570 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-27 20:09:20,571 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:09:20,571 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-27 20:09:20,615 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:20,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 48 transitions, 132 flow [2024-11-27 20:09:20,651 INFO L124 PetriNetUnfolderBase]: 8/67 cut-off events. [2024-11-27 20:09:20,651 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-27 20:09:20,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 67 events. 8/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 84. Up to 8 conditions per place. [2024-11-27 20:09:20,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 48 transitions, 132 flow [2024-11-27 20:09:20,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 73 flow [2024-11-27 20:09:20,657 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:20,658 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;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:20,658 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-27 20:09:20,673 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:20,673 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-27 20:09:20,673 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:09:20,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:20,673 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:20,673 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 20:09:20,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash -105618767, now seen corresponding path program 1 times [2024-11-27 20:09:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:20,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432980109] [2024-11-27 20:09:20,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:20,882 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 20:09:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432980109] [2024-11-27 20:09:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432980109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:20,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:20,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:20,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535744915] [2024-11-27 20:09:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:20,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:20,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:20,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:20,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:20,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-27 20:09:20,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 20:09:20,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:20,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-27 20:09:20,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:21,214 INFO L124 PetriNetUnfolderBase]: 810/1403 cut-off events. [2024-11-27 20:09:21,214 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-11-27 20:09:21,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1403 events. 810/1403 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7569 event pairs, 602 based on Foata normal form. 0/1280 useless extension candidates. Maximal degree in co-relation 916. Up to 1198 conditions per place. [2024-11-27 20:09:21,236 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-27 20:09:21,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 127 flow [2024-11-27 20:09:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-27 20:09:21,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-27 20:09:21,241 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 73 flow. Second operand 4 states and 84 transitions. [2024-11-27 20:09:21,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 127 flow [2024-11-27 20:09:21,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:21,248 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 84 flow [2024-11-27 20:09:21,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2024-11-27 20:09:21,251 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-27 20:09:21,251 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 84 flow [2024-11-27 20:09:21,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 20:09:21,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:21,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:21,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:09:21,253 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 20:09:21,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1383777874, now seen corresponding path program 1 times [2024-11-27 20:09:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390226750] [2024-11-27 20:09:21,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:21,536 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 20:09:21,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:21,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390226750] [2024-11-27 20:09:21,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390226750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:21,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:21,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:21,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981862120] [2024-11-27 20:09:21,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:21,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:21,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:21,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:21,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:21,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-27 20:09:21,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 20:09:21,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:21,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-27 20:09:21,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:22,082 INFO L124 PetriNetUnfolderBase]: 1335/2156 cut-off events. [2024-11-27 20:09:22,082 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-11-27 20:09:22,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4323 conditions, 2156 events. 1335/2156 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11661 event pairs, 907 based on Foata normal form. 78/2056 useless extension candidates. Maximal degree in co-relation 1568. Up to 1455 conditions per place. [2024-11-27 20:09:22,104 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 25 selfloop transitions, 3 changer transitions 8/43 dead transitions. [2024-11-27 20:09:22,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 188 flow [2024-11-27 20:09:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-11-27 20:09:22,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-11-27 20:09:22,107 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 84 flow. Second operand 5 states and 106 transitions. [2024-11-27 20:09:22,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 188 flow [2024-11-27 20:09:22,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:22,113 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 96 flow [2024-11-27 20:09:22,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-11-27 20:09:22,114 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-27 20:09:22,114 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 96 flow [2024-11-27 20:09:22,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 20:09:22,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:22,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:22,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:09:22,117 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 20:09:22,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:22,118 INFO L85 PathProgramCache]: Analyzing trace with hash -52589393, now seen corresponding path program 1 times [2024-11-27 20:09:22,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:22,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257437016] [2024-11-27 20:09:22,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:22,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257437016] [2024-11-27 20:09:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257437016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:22,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864364380] [2024-11-27 20:09:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:22,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:22,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:22,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:22,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:22,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-27 20:09:22,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 20:09:22,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:22,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-27 20:09:22,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:22,565 INFO L124 PetriNetUnfolderBase]: 952/1626 cut-off events. [2024-11-27 20:09:22,565 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2024-11-27 20:09:22,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 1626 events. 952/1626 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8721 event pairs, 448 based on Foata normal form. 3/1539 useless extension candidates. Maximal degree in co-relation 3425. Up to 1366 conditions per place. [2024-11-27 20:09:22,583 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 26 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-27 20:09:22,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 176 flow [2024-11-27 20:09:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-27 20:09:22,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-27 20:09:22,586 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 96 flow. Second operand 5 states and 105 transitions. [2024-11-27 20:09:22,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 176 flow [2024-11-27 20:09:22,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 168 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:22,602 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 106 flow [2024-11-27 20:09:22,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2024-11-27 20:09:22,603 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-11-27 20:09:22,603 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 106 flow [2024-11-27 20:09:22,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 20:09:22,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:22,603 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:22,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:09:22,604 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-27 20:09:22,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 216315505, now seen corresponding path program 1 times [2024-11-27 20:09:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111723913] [2024-11-27 20:09:22,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:22,635 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:09:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:22,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:09:22,663 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:09:22,663 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-27 20:09:22,663 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-27 20:09:22,663 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-27 20:09:22,664 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-27 20:09:22,664 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-27 20:09:22,664 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-27 20:09:22,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:09:22,664 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-27 20:09:22,665 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:09:22,665 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-27 20:09:22,745 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:22,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 61 transitions, 178 flow [2024-11-27 20:09:22,762 INFO L124 PetriNetUnfolderBase]: 10/84 cut-off events. [2024-11-27 20:09:22,762 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-27 20:09:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 84 events. 10/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 108. Up to 10 conditions per place. [2024-11-27 20:09:22,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 61 transitions, 178 flow [2024-11-27 20:09:22,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 30 transitions, 91 flow [2024-11-27 20:09:22,766 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:22,767 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;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:22,767 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-27 20:09:22,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:22,772 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-27 20:09:22,773 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:09:22,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:22,773 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:22,773 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-27 20:09:22,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash 364540857, now seen corresponding path program 1 times [2024-11-27 20:09:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:22,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839278660] [2024-11-27 20:09:22,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:22,856 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 20:09:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839278660] [2024-11-27 20:09:22,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839278660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:22,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:22,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746611673] [2024-11-27 20:09:22,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:22,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:22,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:22,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:22,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-27 20:09:22,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:22,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:22,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-27 20:09:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:23,510 INFO L124 PetriNetUnfolderBase]: 3240/5027 cut-off events. [2024-11-27 20:09:23,510 INFO L125 PetriNetUnfolderBase]: For 498/498 co-relation queries the response was YES. [2024-11-27 20:09:23,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 5027 events. 3240/5027 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29727 event pairs, 2202 based on Foata normal form. 0/4664 useless extension candidates. Maximal degree in co-relation 3436. Up to 4438 conditions per place. [2024-11-27 20:09:23,550 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-27 20:09:23,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 151 flow [2024-11-27 20:09:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-27 20:09:23,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42213114754098363 [2024-11-27 20:09:23,553 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 91 flow. Second operand 4 states and 103 transitions. [2024-11-27 20:09:23,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 151 flow [2024-11-27 20:09:23,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 144 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:23,561 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 98 flow [2024-11-27 20:09:23,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-11-27 20:09:23,562 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-11-27 20:09:23,562 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 98 flow [2024-11-27 20:09:23,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:23,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:23,562 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:23,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 20:09:23,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-27 20:09:23,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash -765336111, now seen corresponding path program 1 times [2024-11-27 20:09:23,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:23,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545757035] [2024-11-27 20:09:23,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:23,765 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 20:09:23,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:23,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545757035] [2024-11-27 20:09:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545757035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:23,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:23,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:23,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12330378] [2024-11-27 20:09:23,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:23,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:23,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:23,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:23,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-11-27 20:09:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 20:09:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-11-27 20:09:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:24,966 INFO L124 PetriNetUnfolderBase]: 5304/7819 cut-off events. [2024-11-27 20:09:24,966 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-27 20:09:24,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15657 conditions, 7819 events. 5304/7819 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46408 event pairs, 3688 based on Foata normal form. 240/7557 useless extension candidates. Maximal degree in co-relation 15620. Up to 5370 conditions per place. [2024-11-27 20:09:25,041 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 30 selfloop transitions, 3 changer transitions 10/51 dead transitions. [2024-11-27 20:09:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 224 flow [2024-11-27 20:09:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-27 20:09:25,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2024-11-27 20:09:25,048 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 98 flow. Second operand 5 states and 133 transitions. [2024-11-27 20:09:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 224 flow [2024-11-27 20:09:25,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:25,055 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 110 flow [2024-11-27 20:09:25,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2024-11-27 20:09:25,056 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-11-27 20:09:25,056 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 110 flow [2024-11-27 20:09:25,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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 20:09:25,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:25,057 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:25,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:09:25,057 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-27 20:09:25,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:25,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2044353888, now seen corresponding path program 1 times [2024-11-27 20:09:25,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:25,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316478574] [2024-11-27 20:09:25,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:25,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316478574] [2024-11-27 20:09:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316478574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:25,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623989072] [2024-11-27 20:09:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:25,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:25,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:25,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:25,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-27 20:09:25,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:25,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:25,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-27 20:09:25,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:26,154 INFO L124 PetriNetUnfolderBase]: 3895/5964 cut-off events. [2024-11-27 20:09:26,155 INFO L125 PetriNetUnfolderBase]: For 1222/1222 co-relation queries the response was YES. [2024-11-27 20:09:26,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13173 conditions, 5964 events. 3895/5964 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35149 event pairs, 1795 based on Foata normal form. 3/5715 useless extension candidates. Maximal degree in co-relation 12785. Up to 5281 conditions per place. [2024-11-27 20:09:26,205 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-11-27 20:09:26,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 196 flow [2024-11-27 20:09:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-27 20:09:26,208 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.419672131147541 [2024-11-27 20:09:26,208 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 110 flow. Second operand 5 states and 128 transitions. [2024-11-27 20:09:26,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 196 flow [2024-11-27 20:09:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 188 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:26,238 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 120 flow [2024-11-27 20:09:26,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-11-27 20:09:26,240 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-11-27 20:09:26,240 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 120 flow [2024-11-27 20:09:26,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:26,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:26,241 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:26,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:09:26,242 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-27 20:09:26,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1729065593, now seen corresponding path program 1 times [2024-11-27 20:09:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179615328] [2024-11-27 20:09:26,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:26,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:26,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179615328] [2024-11-27 20:09:26,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179615328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:26,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:26,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:26,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824220791] [2024-11-27 20:09:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:26,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:26,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:26,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:26,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-27 20:09:26,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:26,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:26,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-27 20:09:26,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:27,189 INFO L124 PetriNetUnfolderBase]: 3742/5631 cut-off events. [2024-11-27 20:09:27,190 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2024-11-27 20:09:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12169 conditions, 5631 events. 3742/5631 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32259 event pairs, 930 based on Foata normal form. 9/5397 useless extension candidates. Maximal degree in co-relation 5463. Up to 4942 conditions per place. [2024-11-27 20:09:27,234 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 36 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-11-27 20:09:27,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 238 flow [2024-11-27 20:09:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-11-27 20:09:27,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42349726775956287 [2024-11-27 20:09:27,236 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 120 flow. Second operand 6 states and 155 transitions. [2024-11-27 20:09:27,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 238 flow [2024-11-27 20:09:27,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 230 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:27,249 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 134 flow [2024-11-27 20:09:27,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-11-27 20:09:27,251 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-11-27 20:09:27,251 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 134 flow [2024-11-27 20:09:27,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:27,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:27,252 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:27,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 20:09:27,252 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-27 20:09:27,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 826354296, now seen corresponding path program 1 times [2024-11-27 20:09:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:27,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033195825] [2024-11-27 20:09:27,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:27,280 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:09:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:27,299 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:09:27,322 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:09:27,322 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-27 20:09:27,323 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-27 20:09:27,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 20:09:27,324 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-27 20:09:27,324 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:09:27,324 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-27 20:09:27,387 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:27,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 74 transitions, 228 flow [2024-11-27 20:09:27,400 INFO L124 PetriNetUnfolderBase]: 12/101 cut-off events. [2024-11-27 20:09:27,401 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-27 20:09:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 101 events. 12/101 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 308 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2024-11-27 20:09:27,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 74 transitions, 228 flow [2024-11-27 20:09:27,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 111 flow [2024-11-27 20:09:27,403 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:27,403 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;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:27,404 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-27 20:09:27,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:27,407 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-27 20:09:27,407 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:09:27,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:27,407 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:27,407 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:27,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash -969181106, now seen corresponding path program 1 times [2024-11-27 20:09:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:27,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222437410] [2024-11-27 20:09:27,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:27,463 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 20:09:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222437410] [2024-11-27 20:09:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222437410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:27,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:27,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119094687] [2024-11-27 20:09:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:27,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:27,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:27,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:27,471 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-27 20:09:27,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 20:09:27,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:27,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-27 20:09:27,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:29,908 INFO L124 PetriNetUnfolderBase]: 12150/17555 cut-off events. [2024-11-27 20:09:29,908 INFO L125 PetriNetUnfolderBase]: For 2391/2391 co-relation queries the response was YES. [2024-11-27 20:09:29,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34740 conditions, 17555 events. 12150/17555 cut-off events. For 2391/2391 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 109955 event pairs, 10214 based on Foata normal form. 0/16463 useless extension candidates. Maximal degree in co-relation 12400. Up to 15778 conditions per place. [2024-11-27 20:09:30,030 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-11-27 20:09:30,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 177 flow [2024-11-27 20:09:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-11-27 20:09:30,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-27 20:09:30,034 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 111 flow. Second operand 4 states and 122 transitions. [2024-11-27 20:09:30,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 177 flow [2024-11-27 20:09:30,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 164 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:30,059 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 112 flow [2024-11-27 20:09:30,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2024-11-27 20:09:30,060 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2024-11-27 20:09:30,060 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 112 flow [2024-11-27 20:09:30,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 20:09:30,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:30,061 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:30,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:09:30,061 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:30,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1109471504, now seen corresponding path program 1 times [2024-11-27 20:09:30,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:30,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172864201] [2024-11-27 20:09:30,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:30,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:30,222 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 20:09:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172864201] [2024-11-27 20:09:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172864201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:30,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:30,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:30,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273157733] [2024-11-27 20:09:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:30,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:30,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:30,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:30,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-11-27 20:09:30,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:30,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:30,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-11-27 20:09:30,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:32,789 INFO L124 PetriNetUnfolderBase]: 19803/27394 cut-off events. [2024-11-27 20:09:32,789 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2024-11-27 20:09:32,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54835 conditions, 27394 events. 19803/27394 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 168939 event pairs, 13975 based on Foata normal form. 726/26646 useless extension candidates. Maximal degree in co-relation 54797. Up to 19059 conditions per place. [2024-11-27 20:09:32,961 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 35 selfloop transitions, 3 changer transitions 12/59 dead transitions. [2024-11-27 20:09:32,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 260 flow [2024-11-27 20:09:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-27 20:09:32,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-11-27 20:09:32,963 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 112 flow. Second operand 5 states and 160 transitions. [2024-11-27 20:09:32,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 260 flow [2024-11-27 20:09:32,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:32,967 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 124 flow [2024-11-27 20:09:32,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2024-11-27 20:09:32,968 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-11-27 20:09:32,968 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 124 flow [2024-11-27 20:09:32,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:32,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:32,968 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:32,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:09:32,969 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:32,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 33847878, now seen corresponding path program 1 times [2024-11-27 20:09:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262415487] [2024-11-27 20:09:32,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:33,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:33,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262415487] [2024-11-27 20:09:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262415487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:33,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:33,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:33,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120561526] [2024-11-27 20:09:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:33,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:33,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:33,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:33,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:33,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-27 20:09:33,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:33,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:33,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-27 20:09:33,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:34,670 INFO L124 PetriNetUnfolderBase]: 14668/21030 cut-off events. [2024-11-27 20:09:34,671 INFO L125 PetriNetUnfolderBase]: For 4485/4485 co-relation queries the response was YES. [2024-11-27 20:09:34,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45736 conditions, 21030 events. 14668/21030 cut-off events. For 4485/4485 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 132376 event pairs, 8190 based on Foata normal form. 3/20295 useless extension candidates. Maximal degree in co-relation 44861. Up to 18970 conditions per place. [2024-11-27 20:09:34,956 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-11-27 20:09:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 216 flow [2024-11-27 20:09:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-27 20:09:34,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4081081081081081 [2024-11-27 20:09:34,958 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 124 flow. Second operand 5 states and 151 transitions. [2024-11-27 20:09:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 216 flow [2024-11-27 20:09:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 208 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:35,070 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 134 flow [2024-11-27 20:09:35,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2024-11-27 20:09:35,071 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2024-11-27 20:09:35,071 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 134 flow [2024-11-27 20:09:35,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:35,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:35,073 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:35,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:09:35,073 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:35,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1019186935, now seen corresponding path program 1 times [2024-11-27 20:09:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:35,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908595234] [2024-11-27 20:09:35,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:35,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:35,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908595234] [2024-11-27 20:09:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908595234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:35,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:35,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503964586] [2024-11-27 20:09:35,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:35,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:35,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:35,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:35,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-27 20:09:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 20:09:35,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:35,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-27 20:09:35,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:37,094 INFO L124 PetriNetUnfolderBase]: 14515/20616 cut-off events. [2024-11-27 20:09:37,094 INFO L125 PetriNetUnfolderBase]: For 3126/3126 co-relation queries the response was YES. [2024-11-27 20:09:37,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44003 conditions, 20616 events. 14515/20616 cut-off events. For 3126/3126 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 127626 event pairs, 5385 based on Foata normal form. 9/19896 useless extension candidates. Maximal degree in co-relation 19962. Up to 18631 conditions per place. [2024-11-27 20:09:37,209 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 39 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-11-27 20:09:37,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 258 flow [2024-11-27 20:09:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-11-27 20:09:37,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4099099099099099 [2024-11-27 20:09:37,212 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 134 flow. Second operand 6 states and 182 transitions. [2024-11-27 20:09:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 258 flow [2024-11-27 20:09:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 250 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:37,261 INFO L231 Difference]: Finished difference. Result has 58 places, 38 transitions, 148 flow [2024-11-27 20:09:37,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=58, PETRI_TRANSITIONS=38} [2024-11-27 20:09:37,262 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 11 predicate places. [2024-11-27 20:09:37,262 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 38 transitions, 148 flow [2024-11-27 20:09:37,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 20:09:37,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:37,263 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:37,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 20:09:37,263 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:37,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 949341799, now seen corresponding path program 1 times [2024-11-27 20:09:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308607846] [2024-11-27 20:09:37,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308607846] [2024-11-27 20:09:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308607846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:37,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:09:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69319767] [2024-11-27 20:09:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:37,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:09:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:37,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:09:37,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:09:37,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-27 20:09:37,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 38 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 20:09:37,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:37,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-27 20:09:37,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:39,024 INFO L124 PetriNetUnfolderBase]: 13894/19725 cut-off events. [2024-11-27 20:09:39,024 INFO L125 PetriNetUnfolderBase]: For 4427/4427 co-relation queries the response was YES. [2024-11-27 20:09:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42675 conditions, 19725 events. 13894/19725 cut-off events. For 4427/4427 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 120255 event pairs, 4000 based on Foata normal form. 27/18942 useless extension candidates. Maximal degree in co-relation 27459. Up to 17362 conditions per place. [2024-11-27 20:09:39,163 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 48 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-11-27 20:09:39,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 312 flow [2024-11-27 20:09:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:09:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:09:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-11-27 20:09:39,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41505791505791506 [2024-11-27 20:09:39,166 INFO L175 Difference]: Start difference. First operand has 58 places, 38 transitions, 148 flow. Second operand 7 states and 215 transitions. [2024-11-27 20:09:39,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 312 flow [2024-11-27 20:09:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 300 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:39,214 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 162 flow [2024-11-27 20:09:39,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2024-11-27 20:09:39,215 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2024-11-27 20:09:39,216 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 162 flow [2024-11-27 20:09:39,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 20:09:39,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:39,216 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:39,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 20:09:39,217 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 20:09:39,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 53065168, now seen corresponding path program 1 times [2024-11-27 20:09:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457648602] [2024-11-27 20:09:39,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:39,238 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:09:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:09:39,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:09:39,257 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:09:39,257 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-27 20:09:39,258 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-27 20:09:39,259 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-27 20:09:39,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-27 20:09:39,259 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-27 20:09:39,260 WARN L246 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:09:39,260 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-27 20:09:39,329 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-27 20:09:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 282 flow [2024-11-27 20:09:39,346 INFO L124 PetriNetUnfolderBase]: 14/118 cut-off events. [2024-11-27 20:09:39,347 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-27 20:09:39,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 118 events. 14/118 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 349 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 159. Up to 14 conditions per place. [2024-11-27 20:09:39,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 87 transitions, 282 flow [2024-11-27 20:09:39,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 38 transitions, 133 flow [2024-11-27 20:09:39,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:39,350 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40da9417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:39,350 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-27 20:09:39,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:39,354 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-27 20:09:39,354 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:09:39,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:39,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:39,355 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-27 20:09:39,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 188675184, now seen corresponding path program 1 times [2024-11-27 20:09:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396794081] [2024-11-27 20:09:39,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:39,410 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 20:09:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396794081] [2024-11-27 20:09:39,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396794081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:39,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:39,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:39,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085443459] [2024-11-27 20:09:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:39,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:39,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:39,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:39,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:39,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-27 20:09:39,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:09:39,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:39,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-27 20:09:39,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:44,446 INFO L124 PetriNetUnfolderBase]: 43740/59999 cut-off events. [2024-11-27 20:09:44,446 INFO L125 PetriNetUnfolderBase]: For 10329/10329 co-relation queries the response was YES. [2024-11-27 20:09:44,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119224 conditions, 59999 events. 43740/59999 cut-off events. For 10329/10329 co-relation queries the response was YES. Maximal size of possible extension queue 2484. Compared 392776 event pairs, 37916 based on Foata normal form. 0/56720 useless extension candidates. Maximal degree in co-relation 43423. Up to 54658 conditions per place. [2024-11-27 20:09:45,094 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 29 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-27 20:09:45,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 205 flow [2024-11-27 20:09:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-27 20:09:45,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-11-27 20:09:45,096 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 133 flow. Second operand 4 states and 141 transitions. [2024-11-27 20:09:45,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 205 flow [2024-11-27 20:09:45,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 184 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:45,209 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 126 flow [2024-11-27 20:09:45,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-11-27 20:09:45,210 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-11-27 20:09:45,210 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 126 flow [2024-11-27 20:09:45,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:09:45,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:45,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:45,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 20:09:45,211 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-27 20:09:45,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1581241329, now seen corresponding path program 1 times [2024-11-27 20:09:45,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:45,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656011097] [2024-11-27 20:09:45,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:45,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:45,302 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 20:09:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656011097] [2024-11-27 20:09:45,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656011097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:45,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:45,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:45,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253796020] [2024-11-27 20:09:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:45,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:45,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:45,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:45,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-27 20:09:45,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:45,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:45,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-27 20:09:45,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:53,199 INFO L124 PetriNetUnfolderBase]: 71076/93883 cut-off events. [2024-11-27 20:09:53,199 INFO L125 PetriNetUnfolderBase]: For 5931/5931 co-relation queries the response was YES. [2024-11-27 20:09:53,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187907 conditions, 93883 events. 71076/93883 cut-off events. For 5931/5931 co-relation queries the response was YES. Maximal size of possible extension queue 3470. Compared 598144 event pairs, 50668 based on Foata normal form. 2184/91677 useless extension candidates. Maximal degree in co-relation 187868. Up to 65958 conditions per place. [2024-11-27 20:09:53,725 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 3 changer transitions 14/67 dead transitions. [2024-11-27 20:09:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 296 flow [2024-11-27 20:09:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-27 20:09:53,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4298850574712644 [2024-11-27 20:09:53,727 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 126 flow. Second operand 5 states and 187 transitions. [2024-11-27 20:09:53,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 296 flow [2024-11-27 20:09:53,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:53,742 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 138 flow [2024-11-27 20:09:53,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2024-11-27 20:09:53,743 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-27 20:09:53,744 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 138 flow [2024-11-27 20:09:53,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:53,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:53,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:53,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-27 20:09:53,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-27 20:09:53,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1773871247, now seen corresponding path program 1 times [2024-11-27 20:09:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:53,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240761765] [2024-11-27 20:09:53,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240761765] [2024-11-27 20:09:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240761765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:53,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:53,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:53,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695657025] [2024-11-27 20:09:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:53,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:53,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:53,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:53,833 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-27 20:09:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 20:09:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-27 20:09:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:00,183 INFO L124 PetriNetUnfolderBase]: 52819/71952 cut-off events. [2024-11-27 20:10:00,184 INFO L125 PetriNetUnfolderBase]: For 14925/14925 co-relation queries the response was YES. [2024-11-27 20:10:00,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154979 conditions, 71952 events. 52819/71952 cut-off events. For 14925/14925 co-relation queries the response was YES. Maximal size of possible extension queue 2732. Compared 469508 event pairs, 37569 based on Foata normal form. 3/69759 useless extension candidates. Maximal degree in co-relation 152645. Up to 65869 conditions per place. [2024-11-27 20:10:00,619 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 35 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-27 20:10:00,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 236 flow [2024-11-27 20:10:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:10:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:10:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-11-27 20:10:00,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-27 20:10:00,621 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 138 flow. Second operand 5 states and 174 transitions. [2024-11-27 20:10:00,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 236 flow [2024-11-27 20:10:01,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 228 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:10:01,333 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 148 flow [2024-11-27 20:10:01,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2024-11-27 20:10:01,333 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-11-27 20:10:01,333 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 148 flow [2024-11-27 20:10:01,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 20:10:01,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:01,334 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:01,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-27 20:10:01,334 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-27 20:10:01,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1470652783, now seen corresponding path program 1 times [2024-11-27 20:10:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:01,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45578174] [2024-11-27 20:10:01,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:10:01,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45578174] [2024-11-27 20:10:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45578174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:01,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:01,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079661855] [2024-11-27 20:10:01,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:01,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:01,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:01,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:01,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-27 20:10:01,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 20:10:01,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:01,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-27 20:10:01,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:07,483 INFO L124 PetriNetUnfolderBase]: 52666/71565 cut-off events. [2024-11-27 20:10:07,483 INFO L125 PetriNetUnfolderBase]: For 11919/11919 co-relation queries the response was YES. [2024-11-27 20:10:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151329 conditions, 71565 events. 52666/71565 cut-off events. For 11919/11919 co-relation queries the response was YES. Maximal size of possible extension queue 2721. Compared 464144 event pairs, 28884 based on Foata normal form. 9/69387 useless extension candidates. Maximal degree in co-relation 69453. Up to 65530 conditions per place. [2024-11-27 20:10:07,928 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-11-27 20:10:07,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 278 flow [2024-11-27 20:10:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-27 20:10:07,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4003831417624521 [2024-11-27 20:10:07,930 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 148 flow. Second operand 6 states and 209 transitions. [2024-11-27 20:10:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 278 flow [2024-11-27 20:10:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-27 20:10:08,278 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 162 flow [2024-11-27 20:10:08,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2024-11-27 20:10:08,279 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-11-27 20:10:08,279 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 162 flow [2024-11-27 20:10:08,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 20:10:08,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:08,280 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:08,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-27 20:10:08,280 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-27 20:10:08,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1881897586, now seen corresponding path program 1 times [2024-11-27 20:10:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:08,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416565172] [2024-11-27 20:10:08,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:10:08,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416565172] [2024-11-27 20:10:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416565172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:08,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:10:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028311486] [2024-11-27 20:10:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:08,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:10:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:08,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:10:08,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:10:08,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-27 20:10:08,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 20:10:08,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:08,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-27 20:10:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand