./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:59,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:59,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:59,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:59,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:59,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:59,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:59,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:59,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:59,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:59,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:59,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:59,263 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:59,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:59,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:59,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:59,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:59,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:59,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:59,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:59,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:59,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:59,269 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:59,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:59,270 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:59,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:59,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:59,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:59,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:59,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:59,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:59,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:59,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:59,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:59,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:59,275 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:59,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:59,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:59,276 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:59,277 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2023-11-06 23:01:59,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:59,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:59,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:59,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:59,628 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:59,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/queue_longer.i [2023-11-06 23:02:02,994 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:02:03,340 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:02:03,341 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i [2023-11-06 23:02:03,366 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/data/5e25b5a76/ba3d60f247e54da497c4569c2f15cfe2/FLAG0ac252780 [2023-11-06 23:02:03,383 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/data/5e25b5a76/ba3d60f247e54da497c4569c2f15cfe2 [2023-11-06 23:02:03,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:02:03,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:02:03,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:03,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:02:03,401 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:02:03,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:03" (1/1) ... [2023-11-06 23:02:03,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a17f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:03, skipping insertion in model container [2023-11-06 23:02:03,407 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:03" (1/1) ... [2023-11-06 23:02:03,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:02:04,082 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2023-11-06 23:02:04,093 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2023-11-06 23:02:04,095 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2023-11-06 23:02:04,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:04,111 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:02:04,176 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2023-11-06 23:02:04,178 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2023-11-06 23:02:04,181 WARN L240 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_11fbf693-43d8-4182-845f-73f4d8671583/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2023-11-06 23:02:04,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:04,321 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:02:04,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04 WrapperNode [2023-11-06 23:02:04,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:04,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:04,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:02:04,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:02:04,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,447 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 242 [2023-11-06 23:02:04,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:04,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:02:04,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:02:04,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:02:04,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:02:04,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:02:04,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:02:04,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:02:04,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (1/1) ... [2023-11-06 23:02:04,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:04,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:02:04,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11fbf693-43d8-4182-845f-73f4d8671583/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 23:02:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 23:02:04,581 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:02:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:02:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:02:04,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:02:04,583 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:02:04,742 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:02:04,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:02:05,228 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:02:05,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:02:05,254 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:02:05,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:05 BoogieIcfgContainer [2023-11-06 23:02:05,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:02:05,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:02:05,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:02:05,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:02:05,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:03" (1/3) ... [2023-11-06 23:02:05,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287cd63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:05, skipping insertion in model container [2023-11-06 23:02:05,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:04" (2/3) ... [2023-11-06 23:02:05,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287cd63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:05, skipping insertion in model container [2023-11-06 23:02:05,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:05" (3/3) ... [2023-11-06 23:02:05,265 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-11-06 23:02:05,280 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:02:05,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:02:05,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-06 23:02:05,296 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:02:05,490 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:02:05,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 270 transitions, 554 flow [2023-11-06 23:02:05,691 INFO L124 PetriNetUnfolderBase]: 15/268 cut-off events. [2023-11-06 23:02:05,691 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:02:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 268 events. 15/268 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 194. Up to 2 conditions per place. [2023-11-06 23:02:05,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 270 transitions, 554 flow [2023-11-06 23:02:05,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 258 transitions, 525 flow [2023-11-06 23:02:05,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:02:05,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 258 transitions, 525 flow [2023-11-06 23:02:05,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 258 transitions, 525 flow [2023-11-06 23:02:05,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 258 transitions, 525 flow [2023-11-06 23:02:05,839 INFO L124 PetriNetUnfolderBase]: 15/258 cut-off events. [2023-11-06 23:02:05,839 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:02:05,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 258 events. 15/258 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 334 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 194. Up to 2 conditions per place. [2023-11-06 23:02:05,857 INFO L119 LiptonReduction]: Number of co-enabled transitions 17164 [2023-11-06 23:02:15,764 INFO L134 LiptonReduction]: Checked pairs total: 33166 [2023-11-06 23:02:15,764 INFO L136 LiptonReduction]: Total number of compositions: 228 [2023-11-06 23:02:15,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:15,791 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@6adb721a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:15,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 23:02:15,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:15,793 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 23:02:15,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:02:15,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:15,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 23:02:15,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:15,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1047, now seen corresponding path program 1 times [2023-11-06 23:02:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682255773] [2023-11-06 23:02:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682255773] [2023-11-06 23:02:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682255773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 23:02:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370886168] [2023-11-06 23:02:15,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:02:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:02:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:02:16,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 498 [2023-11-06 23:02:16,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 139 flow. Second operand has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:16,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 498 [2023-11-06 23:02:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:16,561 INFO L124 PetriNetUnfolderBase]: 1795/2998 cut-off events. [2023-11-06 23:02:16,561 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 23:02:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2998 events. 1795/2998 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 13719 event pairs, 1455 based on Foata normal form. 38/2576 useless extension candidates. Maximal degree in co-relation 5682. Up to 2783 conditions per place. [2023-11-06 23:02:16,587 INFO L140 encePairwiseOnDemand]: 496/498 looper letters, 56 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2023-11-06 23:02:16,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 247 flow [2023-11-06 23:02:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:02:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 23:02:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 572 transitions. [2023-11-06 23:02:16,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742971887550201 [2023-11-06 23:02:16,612 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 572 transitions. [2023-11-06 23:02:16,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 572 transitions. [2023-11-06 23:02:16,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:16,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 572 transitions. [2023-11-06 23:02:16,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 498.0) internal successors, (1494), 3 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,636 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 498.0) internal successors, (1494), 3 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,638 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 139 flow. Second operand 2 states and 572 transitions. [2023-11-06 23:02:16,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 247 flow [2023-11-06 23:02:16,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:02:16,648 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 130 flow [2023-11-06 23:02:16,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-06 23:02:16,654 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-11-06 23:02:16,655 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 130 flow [2023-11-06 23:02:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:16,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:16,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:16,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2045173191, now seen corresponding path program 1 times [2023-11-06 23:02:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:16,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816573961] [2023-11-06 23:02:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:16,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:16,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:16,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816573961] [2023-11-06 23:02:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816573961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231669321] [2023-11-06 23:02:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:16,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 498 [2023-11-06 23:02:16,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:16,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 498 [2023-11-06 23:02:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:17,456 INFO L124 PetriNetUnfolderBase]: 1755/2962 cut-off events. [2023-11-06 23:02:17,457 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:02:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5764 conditions, 2962 events. 1755/2962 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 13819 event pairs, 1401 based on Foata normal form. 0/2540 useless extension candidates. Maximal degree in co-relation 5761. Up to 2611 conditions per place. [2023-11-06 23:02:17,480 INFO L140 encePairwiseOnDemand]: 494/498 looper letters, 74 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-06 23:02:17,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 328 flow [2023-11-06 23:02:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-11-06 23:02:17,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582329317269076 [2023-11-06 23:02:17,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-11-06 23:02:17,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-11-06 23:02:17,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:17,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-11-06 23:02:17,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,506 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 130 flow. Second operand 3 states and 834 transitions. [2023-11-06 23:02:17,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 328 flow [2023-11-06 23:02:17,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:17,510 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2023-11-06 23:02:17,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-06 23:02:17,511 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-11-06 23:02:17,512 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2023-11-06 23:02:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:17,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:17,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:17,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:17,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1684074440, now seen corresponding path program 1 times [2023-11-06 23:02:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:17,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602489424] [2023-11-06 23:02:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:17,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602489424] [2023-11-06 23:02:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602489424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:02:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821197733] [2023-11-06 23:02:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:02:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:02:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:02:18,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 498 [2023-11-06 23:02:18,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:18,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:18,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 498 [2023-11-06 23:02:18,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:18,987 INFO L124 PetriNetUnfolderBase]: 2039/3405 cut-off events. [2023-11-06 23:02:18,988 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-11-06 23:02:18,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6874 conditions, 3405 events. 2039/3405 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16252 event pairs, 1320 based on Foata normal form. 0/2950 useless extension candidates. Maximal degree in co-relation 6870. Up to 2844 conditions per place. [2023-11-06 23:02:19,011 INFO L140 encePairwiseOnDemand]: 484/498 looper letters, 76 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2023-11-06 23:02:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 406 flow [2023-11-06 23:02:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:02:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:02:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1705 transitions. [2023-11-06 23:02:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890992541594951 [2023-11-06 23:02:19,021 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1705 transitions. [2023-11-06 23:02:19,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1705 transitions. [2023-11-06 23:02:19,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:19,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1705 transitions. [2023-11-06 23:02:19,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 243.57142857142858) internal successors, (1705), 7 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:19,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 498.0) internal successors, (3984), 8 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:19,042 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 498.0) internal successors, (3984), 8 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:19,042 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 7 states and 1705 transitions. [2023-11-06 23:02:19,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 406 flow [2023-11-06 23:02:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:19,053 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 252 flow [2023-11-06 23:02:19,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-11-06 23:02:19,054 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-11-06 23:02:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 252 flow [2023-11-06 23:02:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:19,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:19,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:19,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:19,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1609029703, now seen corresponding path program 1 times [2023-11-06 23:02:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:19,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764669114] [2023-11-06 23:02:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:19,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764669114] [2023-11-06 23:02:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764669114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:19,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:02:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398251904] [2023-11-06 23:02:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:20,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 498 [2023-11-06 23:02:20,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 227.85714285714286) internal successors, (1595), 7 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:20,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:20,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 498 [2023-11-06 23:02:20,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:21,429 INFO L124 PetriNetUnfolderBase]: 2194/3677 cut-off events. [2023-11-06 23:02:21,430 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2023-11-06 23:02:21,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 3677 events. 2194/3677 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 18055 event pairs, 420 based on Foata normal form. 19/3294 useless extension candidates. Maximal degree in co-relation 8220. Up to 2823 conditions per place. [2023-11-06 23:02:21,460 INFO L140 encePairwiseOnDemand]: 484/498 looper letters, 112 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2023-11-06 23:02:21,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 140 transitions, 672 flow [2023-11-06 23:02:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1484 transitions. [2023-11-06 23:02:21,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966532797858099 [2023-11-06 23:02:21,467 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1484 transitions. [2023-11-06 23:02:21,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1484 transitions. [2023-11-06 23:02:21,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:21,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1484 transitions. [2023-11-06 23:02:21,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:21,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:21,484 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:21,484 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 252 flow. Second operand 6 states and 1484 transitions. [2023-11-06 23:02:21,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 140 transitions, 672 flow [2023-11-06 23:02:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 672 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:21,496 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 386 flow [2023-11-06 23:02:21,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-11-06 23:02:21,499 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-11-06 23:02:21,500 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 386 flow [2023-11-06 23:02:21,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 227.85714285714286) internal successors, (1595), 7 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:21,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:21,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:02:21,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:21,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1881682345, now seen corresponding path program 2 times [2023-11-06 23:02:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:21,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104776222] [2023-11-06 23:02:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:21,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:22,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104776222] [2023-11-06 23:02:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104776222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:22,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:22,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:02:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082970431] [2023-11-06 23:02:22,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:02:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:02:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:02:23,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-11-06 23:02:23,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 386 flow. Second operand has 10 states, 10 states have (on average 214.3) internal successors, (2143), 10 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:23,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:23,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-11-06 23:02:23,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:24,368 INFO L124 PetriNetUnfolderBase]: 2405/4028 cut-off events. [2023-11-06 23:02:24,369 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-11-06 23:02:24,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 4028 events. 2405/4028 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 20355 event pairs, 533 based on Foata normal form. 19/3609 useless extension candidates. Maximal degree in co-relation 9916. Up to 3165 conditions per place. [2023-11-06 23:02:24,406 INFO L140 encePairwiseOnDemand]: 490/498 looper letters, 116 selfloop transitions, 18 changer transitions 0/140 dead transitions. [2023-11-06 23:02:24,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 810 flow [2023-11-06 23:02:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1396 transitions. [2023-11-06 23:02:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46720214190093706 [2023-11-06 23:02:24,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1396 transitions. [2023-11-06 23:02:24,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1396 transitions. [2023-11-06 23:02:24,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:24,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1396 transitions. [2023-11-06 23:02:24,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.66666666666666) internal successors, (1396), 6 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,429 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 386 flow. Second operand 6 states and 1396 transitions. [2023-11-06 23:02:24,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 810 flow [2023-11-06 23:02:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 140 transitions, 793 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:24,447 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 475 flow [2023-11-06 23:02:24,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=475, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-06 23:02:24,450 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-06 23:02:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 475 flow [2023-11-06 23:02:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.3) internal successors, (2143), 10 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:02:24,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:24,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2078817431, now seen corresponding path program 1 times [2023-11-06 23:02:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627669491] [2023-11-06 23:02:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627669491] [2023-11-06 23:02:25,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627669491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:25,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:02:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368401990] [2023-11-06 23:02:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:25,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:02:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:02:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:02:26,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 498 [2023-11-06 23:02:26,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 475 flow. Second operand has 10 states, 10 states have (on average 214.3) internal successors, (2143), 10 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:26,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:26,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 498 [2023-11-06 23:02:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:27,448 INFO L124 PetriNetUnfolderBase]: 2404/4042 cut-off events. [2023-11-06 23:02:27,448 INFO L125 PetriNetUnfolderBase]: For 3407/3407 co-relation queries the response was YES. [2023-11-06 23:02:27,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 4042 events. 2404/4042 cut-off events. For 3407/3407 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 20584 event pairs, 1661 based on Foata normal form. 0/3603 useless extension candidates. Maximal degree in co-relation 10231. Up to 3803 conditions per place. [2023-11-06 23:02:27,491 INFO L140 encePairwiseOnDemand]: 485/498 looper letters, 84 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2023-11-06 23:02:27,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 110 transitions, 741 flow [2023-11-06 23:02:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:02:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:02:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2214 transitions. [2023-11-06 23:02:27,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44457831325301206 [2023-11-06 23:02:27,565 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2214 transitions. [2023-11-06 23:02:27,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2214 transitions. [2023-11-06 23:02:27,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:27,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2214 transitions. [2023-11-06 23:02:27,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 221.4) internal successors, (2214), 10 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:27,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 498.0) internal successors, (5478), 11 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:27,588 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 498.0) internal successors, (5478), 11 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:27,588 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 475 flow. Second operand 10 states and 2214 transitions. [2023-11-06 23:02:27,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 110 transitions, 741 flow [2023-11-06 23:02:27,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 724 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:27,604 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 576 flow [2023-11-06 23:02:27,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=576, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2023-11-06 23:02:27,607 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2023-11-06 23:02:27,608 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 576 flow [2023-11-06 23:02:27,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.3) internal successors, (2143), 10 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:27,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:27,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:27,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:02:27,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:27,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 664624434, now seen corresponding path program 1 times [2023-11-06 23:02:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098236895] [2023-11-06 23:02:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:28,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:28,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098236895] [2023-11-06 23:02:28,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098236895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:28,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:28,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:02:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315066351] [2023-11-06 23:02:28,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:28,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:02:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:28,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:02:28,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:02:29,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 498 [2023-11-06 23:02:29,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 576 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:29,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 498 [2023-11-06 23:02:29,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:30,816 INFO L124 PetriNetUnfolderBase]: 2749/4606 cut-off events. [2023-11-06 23:02:30,816 INFO L125 PetriNetUnfolderBase]: For 3298/3298 co-relation queries the response was YES. [2023-11-06 23:02:30,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11928 conditions, 4606 events. 2749/4606 cut-off events. For 3298/3298 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 24008 event pairs, 866 based on Foata normal form. 0/4085 useless extension candidates. Maximal degree in co-relation 11906. Up to 3235 conditions per place. [2023-11-06 23:02:30,847 INFO L140 encePairwiseOnDemand]: 484/498 looper letters, 151 selfloop transitions, 38 changer transitions 7/202 dead transitions. [2023-11-06 23:02:30,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 1245 flow [2023-11-06 23:02:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:02:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:02:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2050 transitions. [2023-11-06 23:02:30,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573850959393128 [2023-11-06 23:02:30,857 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2050 transitions. [2023-11-06 23:02:30,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2050 transitions. [2023-11-06 23:02:30,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:30,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2050 transitions. [2023-11-06 23:02:30,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.77777777777777) internal successors, (2050), 9 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,875 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 576 flow. Second operand 9 states and 2050 transitions. [2023-11-06 23:02:30,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 1245 flow [2023-11-06 23:02:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 202 transitions, 1231 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:30,895 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 775 flow [2023-11-06 23:02:30,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=775, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-11-06 23:02:30,897 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 47 predicate places. [2023-11-06 23:02:30,897 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 775 flow [2023-11-06 23:02:30,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:30,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:30,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:02:30,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:30,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash -17252530, now seen corresponding path program 2 times [2023-11-06 23:02:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:30,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185910574] [2023-11-06 23:02:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:30,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185910574] [2023-11-06 23:02:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185910574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:31,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:02:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157231685] [2023-11-06 23:02:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:02:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:02:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:02:33,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 498 [2023-11-06 23:02:33,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:33,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:33,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 498 [2023-11-06 23:02:33,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:35,209 INFO L124 PetriNetUnfolderBase]: 3072/5173 cut-off events. [2023-11-06 23:02:35,210 INFO L125 PetriNetUnfolderBase]: For 5074/5074 co-relation queries the response was YES. [2023-11-06 23:02:35,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14167 conditions, 5173 events. 3072/5173 cut-off events. For 5074/5074 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 27776 event pairs, 974 based on Foata normal form. 0/4552 useless extension candidates. Maximal degree in co-relation 14140. Up to 3163 conditions per place. [2023-11-06 23:02:35,258 INFO L140 encePairwiseOnDemand]: 484/498 looper letters, 155 selfloop transitions, 45 changer transitions 5/211 dead transitions. [2023-11-06 23:02:35,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 211 transitions, 1450 flow [2023-11-06 23:02:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:02:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:02:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2052 transitions. [2023-11-06 23:02:35,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578313253012048 [2023-11-06 23:02:35,268 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2052 transitions. [2023-11-06 23:02:35,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2052 transitions. [2023-11-06 23:02:35,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:35,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2052 transitions. [2023-11-06 23:02:35,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,296 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,297 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 775 flow. Second operand 9 states and 2052 transitions. [2023-11-06 23:02:35,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 211 transitions, 1450 flow [2023-11-06 23:02:35,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 211 transitions, 1384 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-11-06 23:02:35,329 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 917 flow [2023-11-06 23:02:35,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=917, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2023-11-06 23:02:35,332 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 55 predicate places. [2023-11-06 23:02:35,332 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 917 flow [2023-11-06 23:02:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:35,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:35,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:35,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:02:35,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:35,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -18838180, now seen corresponding path program 3 times [2023-11-06 23:02:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:35,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648756857] [2023-11-06 23:02:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:36,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648756857] [2023-11-06 23:02:36,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648756857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:36,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:02:36,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312617553] [2023-11-06 23:02:36,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:02:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:02:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:02:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 498 [2023-11-06 23:02:37,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 917 flow. Second operand has 10 states, 10 states have (on average 211.4) internal successors, (2114), 10 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 498 [2023-11-06 23:02:37,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:38,988 INFO L124 PetriNetUnfolderBase]: 3042/5121 cut-off events. [2023-11-06 23:02:38,989 INFO L125 PetriNetUnfolderBase]: For 5659/5659 co-relation queries the response was YES. [2023-11-06 23:02:39,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14493 conditions, 5121 events. 3042/5121 cut-off events. For 5659/5659 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 27412 event pairs, 966 based on Foata normal form. 19/4576 useless extension candidates. Maximal degree in co-relation 14462. Up to 3161 conditions per place. [2023-11-06 23:02:39,029 INFO L140 encePairwiseOnDemand]: 485/498 looper letters, 153 selfloop transitions, 45 changer transitions 7/211 dead transitions. [2023-11-06 23:02:39,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 211 transitions, 1537 flow [2023-11-06 23:02:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:02:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:02:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2059 transitions. [2023-11-06 23:02:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45939312806782684 [2023-11-06 23:02:39,038 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2059 transitions. [2023-11-06 23:02:39,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2059 transitions. [2023-11-06 23:02:39,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:39,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2059 transitions. [2023-11-06 23:02:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.77777777777777) internal successors, (2059), 9 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,056 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,056 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 917 flow. Second operand 9 states and 2059 transitions. [2023-11-06 23:02:39,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 211 transitions, 1537 flow [2023-11-06 23:02:39,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 211 transitions, 1471 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-06 23:02:39,092 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 964 flow [2023-11-06 23:02:39,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2023-11-06 23:02:39,093 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2023-11-06 23:02:39,095 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 964 flow [2023-11-06 23:02:39,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.4) internal successors, (2114), 10 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:39,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:02:39,097 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:39,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash 423629615, now seen corresponding path program 1 times [2023-11-06 23:02:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:39,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133439168] [2023-11-06 23:02:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:39,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:39,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133439168] [2023-11-06 23:02:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133439168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:39,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:39,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942633916] [2023-11-06 23:02:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:39,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:39,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:39,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 498 [2023-11-06 23:02:39,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 123 transitions, 964 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:39,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 498 [2023-11-06 23:02:39,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:39,784 INFO L124 PetriNetUnfolderBase]: 1839/3143 cut-off events. [2023-11-06 23:02:39,784 INFO L125 PetriNetUnfolderBase]: For 2489/2489 co-relation queries the response was YES. [2023-11-06 23:02:39,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8241 conditions, 3143 events. 1839/3143 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 13558 event pairs, 925 based on Foata normal form. 0/2773 useless extension candidates. Maximal degree in co-relation 8208. Up to 1502 conditions per place. [2023-11-06 23:02:39,806 INFO L140 encePairwiseOnDemand]: 494/498 looper letters, 103 selfloop transitions, 3 changer transitions 4/118 dead transitions. [2023-11-06 23:02:39,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 118 transitions, 971 flow [2023-11-06 23:02:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-11-06 23:02:39,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589022757697456 [2023-11-06 23:02:39,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-11-06 23:02:39,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-11-06 23:02:39,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:39,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-11-06 23:02:39,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,819 INFO L175 Difference]: Start difference. First operand has 123 places, 123 transitions, 964 flow. Second operand 3 states and 835 transitions. [2023-11-06 23:02:39,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 118 transitions, 971 flow [2023-11-06 23:02:39,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 769 flow, removed 2 selfloop flow, removed 28 redundant places. [2023-11-06 23:02:39,832 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 483 flow [2023-11-06 23:02:39,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2023-11-06 23:02:39,833 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2023-11-06 23:02:39,833 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 483 flow [2023-11-06 23:02:39,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:39,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:39,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:02:39,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:39,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1326833003, now seen corresponding path program 1 times [2023-11-06 23:02:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:39,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840555894] [2023-11-06 23:02:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840555894] [2023-11-06 23:02:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840555894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:39,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929229409] [2023-11-06 23:02:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:39,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:39,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:39,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 498 [2023-11-06 23:02:39,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:39,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:39,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 498 [2023-11-06 23:02:39,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:40,269 INFO L124 PetriNetUnfolderBase]: 1001/1833 cut-off events. [2023-11-06 23:02:40,269 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-11-06 23:02:40,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1833 events. 1001/1833 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 7568 event pairs, 275 based on Foata normal form. 4/1725 useless extension candidates. Maximal degree in co-relation 4481. Up to 1402 conditions per place. [2023-11-06 23:02:40,282 INFO L140 encePairwiseOnDemand]: 492/498 looper letters, 83 selfloop transitions, 9 changer transitions 1/101 dead transitions. [2023-11-06 23:02:40,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 687 flow [2023-11-06 23:02:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2023-11-06 23:02:40,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448460508701473 [2023-11-06 23:02:40,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2023-11-06 23:02:40,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2023-11-06 23:02:40,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:40,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2023-11-06 23:02:40,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:40,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:40,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:40,294 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 483 flow. Second operand 3 states and 814 transitions. [2023-11-06 23:02:40,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 687 flow [2023-11-06 23:02:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 678 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:40,302 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 476 flow [2023-11-06 23:02:40,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-11-06 23:02:40,303 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-11-06 23:02:40,303 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 476 flow [2023-11-06 23:02:40,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:40,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:40,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:40,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:02:40,304 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:40,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 75678738, now seen corresponding path program 1 times [2023-11-06 23:02:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796529187] [2023-11-06 23:02:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:42,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:42,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796529187] [2023-11-06 23:02:42,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796529187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:42,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:42,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 23:02:42,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990734309] [2023-11-06 23:02:42,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:42,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:02:42,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:02:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:02:43,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 498 [2023-11-06 23:02:43,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 476 flow. Second operand has 17 states, 17 states have (on average 213.11764705882354) internal successors, (3623), 17 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 498 [2023-11-06 23:02:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:44,764 INFO L124 PetriNetUnfolderBase]: 1477/2771 cut-off events. [2023-11-06 23:02:44,764 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2023-11-06 23:02:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 2771 events. 1477/2771 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 13498 event pairs, 547 based on Foata normal form. 0/2708 useless extension candidates. Maximal degree in co-relation 6693. Up to 1128 conditions per place. [2023-11-06 23:02:44,785 INFO L140 encePairwiseOnDemand]: 473/498 looper letters, 157 selfloop transitions, 49 changer transitions 9/221 dead transitions. [2023-11-06 23:02:44,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 221 transitions, 1263 flow [2023-11-06 23:02:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:02:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:02:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3990 transitions. [2023-11-06 23:02:44,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44511378848728245 [2023-11-06 23:02:44,804 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3990 transitions. [2023-11-06 23:02:44,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3990 transitions. [2023-11-06 23:02:44,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:44,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3990 transitions. [2023-11-06 23:02:44,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 221.66666666666666) internal successors, (3990), 18 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 498.0) internal successors, (9462), 19 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,836 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 498.0) internal successors, (9462), 19 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,836 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 476 flow. Second operand 18 states and 3990 transitions. [2023-11-06 23:02:44,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 221 transitions, 1263 flow [2023-11-06 23:02:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 221 transitions, 1249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:44,850 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 728 flow [2023-11-06 23:02:44,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=728, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2023-11-06 23:02:44,851 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 54 predicate places. [2023-11-06 23:02:44,851 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 728 flow [2023-11-06 23:02:44,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 213.11764705882354) internal successors, (3623), 17 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:44,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:44,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:44,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:02:44,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:44,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:44,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1385041794, now seen corresponding path program 2 times [2023-11-06 23:02:44,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:44,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094924520] [2023-11-06 23:02:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:44,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094924520] [2023-11-06 23:02:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094924520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:46,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 23:02:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252809880] [2023-11-06 23:02:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:46,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:02:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:02:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:02:48,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 498 [2023-11-06 23:02:48,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 728 flow. Second operand has 17 states, 17 states have (on average 213.11764705882354) internal successors, (3623), 17 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:48,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:48,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 498 [2023-11-06 23:02:48,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:49,564 INFO L124 PetriNetUnfolderBase]: 2021/3786 cut-off events. [2023-11-06 23:02:49,564 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2023-11-06 23:02:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9734 conditions, 3786 events. 2021/3786 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 19576 event pairs, 476 based on Foata normal form. 8/3794 useless extension candidates. Maximal degree in co-relation 9707. Up to 1590 conditions per place. [2023-11-06 23:02:49,588 INFO L140 encePairwiseOnDemand]: 473/498 looper letters, 162 selfloop transitions, 64 changer transitions 15/247 dead transitions. [2023-11-06 23:02:49,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 247 transitions, 1671 flow [2023-11-06 23:02:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:02:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:02:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3766 transitions. [2023-11-06 23:02:49,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448381762343492 [2023-11-06 23:02:49,605 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3766 transitions. [2023-11-06 23:02:49,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3766 transitions. [2023-11-06 23:02:49,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:49,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3766 transitions. [2023-11-06 23:02:49,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 221.52941176470588) internal successors, (3766), 17 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:49,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 498.0) internal successors, (8964), 18 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:49,640 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 498.0) internal successors, (8964), 18 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:49,641 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 728 flow. Second operand 17 states and 3766 transitions. [2023-11-06 23:02:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 247 transitions, 1671 flow [2023-11-06 23:02:49,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 247 transitions, 1596 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-11-06 23:02:49,664 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1132 flow [2023-11-06 23:02:49,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1132, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2023-11-06 23:02:49,665 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 71 predicate places. [2023-11-06 23:02:49,665 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1132 flow [2023-11-06 23:02:49,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 213.11764705882354) internal successors, (3623), 17 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:49,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:49,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:49,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:02:49,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:49,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash -57931024, now seen corresponding path program 3 times [2023-11-06 23:02:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:49,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654934447] [2023-11-06 23:02:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654934447] [2023-11-06 23:02:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654934447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 23:02:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796979384] [2023-11-06 23:02:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:02:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:02:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:02:52,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 498 [2023-11-06 23:02:52,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1132 flow. Second operand has 15 states, 15 states have (on average 202.4) internal successors, (3036), 15 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:52,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:52,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 498 [2023-11-06 23:02:52,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:53,634 INFO L124 PetriNetUnfolderBase]: 1417/2657 cut-off events. [2023-11-06 23:02:53,634 INFO L125 PetriNetUnfolderBase]: For 2194/2194 co-relation queries the response was YES. [2023-11-06 23:02:53,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2657 events. 1417/2657 cut-off events. For 2194/2194 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12429 event pairs, 320 based on Foata normal form. 26/2683 useless extension candidates. Maximal degree in co-relation 7391. Up to 1443 conditions per place. [2023-11-06 23:02:53,646 INFO L140 encePairwiseOnDemand]: 479/498 looper letters, 133 selfloop transitions, 43 changer transitions 16/198 dead transitions. [2023-11-06 23:02:53,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 198 transitions, 1469 flow [2023-11-06 23:02:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:02:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:02:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3150 transitions. [2023-11-06 23:02:53,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-11-06 23:02:53,653 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3150 transitions. [2023-11-06 23:02:53,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3150 transitions. [2023-11-06 23:02:53,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:53,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3150 transitions. [2023-11-06 23:02:53,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 210.0) internal successors, (3150), 15 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:53,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 498.0) internal successors, (7968), 16 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:53,676 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 498.0) internal successors, (7968), 16 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:53,676 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1132 flow. Second operand 15 states and 3150 transitions. [2023-11-06 23:02:53,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 198 transitions, 1469 flow [2023-11-06 23:02:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1373 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-06 23:02:53,698 INFO L231 Difference]: Finished difference. Result has 140 places, 120 transitions, 900 flow [2023-11-06 23:02:53,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=900, PETRI_PLACES=140, PETRI_TRANSITIONS=120} [2023-11-06 23:02:53,699 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 77 predicate places. [2023-11-06 23:02:53,699 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 120 transitions, 900 flow [2023-11-06 23:02:53,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 202.4) internal successors, (3036), 15 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:53,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:53,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 23:02:53,701 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:53,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 496690275, now seen corresponding path program 1 times [2023-11-06 23:02:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:53,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098951016] [2023-11-06 23:02:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098951016] [2023-11-06 23:02:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098951016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:55,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-06 23:02:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218378753] [2023-11-06 23:02:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:02:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:02:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:02:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 498 [2023-11-06 23:02:57,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 120 transitions, 900 flow. Second operand has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:57,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 498 [2023-11-06 23:02:57,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:58,904 INFO L124 PetriNetUnfolderBase]: 1607/3002 cut-off events. [2023-11-06 23:02:58,904 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2023-11-06 23:02:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8521 conditions, 3002 events. 1607/3002 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14731 event pairs, 442 based on Foata normal form. 8/3009 useless extension candidates. Maximal degree in co-relation 8483. Up to 892 conditions per place. [2023-11-06 23:02:58,918 INFO L140 encePairwiseOnDemand]: 477/498 looper letters, 153 selfloop transitions, 56 changer transitions 16/231 dead transitions. [2023-11-06 23:02:58,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 231 transitions, 1646 flow [2023-11-06 23:02:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:02:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:02:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3983 transitions. [2023-11-06 23:02:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44433288710397145 [2023-11-06 23:02:58,924 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3983 transitions. [2023-11-06 23:02:58,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3983 transitions. [2023-11-06 23:02:58,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:58,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3983 transitions. [2023-11-06 23:02:58,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 221.27777777777777) internal successors, (3983), 18 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 498.0) internal successors, (9462), 19 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,944 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 498.0) internal successors, (9462), 19 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,944 INFO L175 Difference]: Start difference. First operand has 140 places, 120 transitions, 900 flow. Second operand 18 states and 3983 transitions. [2023-11-06 23:02:58,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 231 transitions, 1646 flow [2023-11-06 23:02:58,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 231 transitions, 1566 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-06 23:02:58,969 INFO L231 Difference]: Finished difference. Result has 150 places, 126 transitions, 1020 flow [2023-11-06 23:02:58,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1020, PETRI_PLACES=150, PETRI_TRANSITIONS=126} [2023-11-06 23:02:58,970 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 87 predicate places. [2023-11-06 23:02:58,970 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 126 transitions, 1020 flow [2023-11-06 23:02:58,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:58,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:58,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 23:02:58,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:02:58,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 481503321, now seen corresponding path program 2 times [2023-11-06 23:02:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:58,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079393975] [2023-11-06 23:02:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:00,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079393975] [2023-11-06 23:03:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079393975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:00,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:00,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 23:03:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669302648] [2023-11-06 23:03:00,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:00,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:03:00,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:03:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:03:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 498 [2023-11-06 23:03:02,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 126 transitions, 1020 flow. Second operand has 17 states, 17 states have (on average 213.1764705882353) internal successors, (3624), 17 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:02,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:02,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 498 [2023-11-06 23:03:02,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:03,775 INFO L124 PetriNetUnfolderBase]: 1786/3336 cut-off events. [2023-11-06 23:03:03,775 INFO L125 PetriNetUnfolderBase]: For 3551/3551 co-relation queries the response was YES. [2023-11-06 23:03:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 3336 events. 1786/3336 cut-off events. For 3551/3551 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16339 event pairs, 374 based on Foata normal form. 8/3342 useless extension candidates. Maximal degree in co-relation 9703. Up to 873 conditions per place. [2023-11-06 23:03:03,794 INFO L140 encePairwiseOnDemand]: 479/498 looper letters, 151 selfloop transitions, 56 changer transitions 14/227 dead transitions. [2023-11-06 23:03:03,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 227 transitions, 1745 flow [2023-11-06 23:03:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:03:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:03:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3550 transitions. [2023-11-06 23:03:03,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455321285140562 [2023-11-06 23:03:03,800 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3550 transitions. [2023-11-06 23:03:03,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3550 transitions. [2023-11-06 23:03:03,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:03,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3550 transitions. [2023-11-06 23:03:03,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 221.875) internal successors, (3550), 16 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 498.0) internal successors, (8466), 17 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,816 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 498.0) internal successors, (8466), 17 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,816 INFO L175 Difference]: Start difference. First operand has 150 places, 126 transitions, 1020 flow. Second operand 16 states and 3550 transitions. [2023-11-06 23:03:03,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 227 transitions, 1745 flow [2023-11-06 23:03:03,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 227 transitions, 1652 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-11-06 23:03:03,850 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 1135 flow [2023-11-06 23:03:03,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1135, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2023-11-06 23:03:03,851 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 94 predicate places. [2023-11-06 23:03:03,851 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 1135 flow [2023-11-06 23:03:03,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 213.1764705882353) internal successors, (3624), 17 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:03,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:03,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 23:03:03,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:03:03,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash -995411259, now seen corresponding path program 1 times [2023-11-06 23:03:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:03,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153680170] [2023-11-06 23:03:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:03,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:07,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153680170] [2023-11-06 23:03:07,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153680170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:07,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:07,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:03:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173469319] [2023-11-06 23:03:07,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:07,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 498 [2023-11-06 23:03:12,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 1135 flow. Second operand has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:12,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:12,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 498 [2023-11-06 23:03:12,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:15,691 INFO L124 PetriNetUnfolderBase]: 2072/3890 cut-off events. [2023-11-06 23:03:15,691 INFO L125 PetriNetUnfolderBase]: For 5849/5853 co-relation queries the response was YES. [2023-11-06 23:03:15,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11751 conditions, 3890 events. 2072/3890 cut-off events. For 5849/5853 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20272 event pairs, 842 based on Foata normal form. 84/3970 useless extension candidates. Maximal degree in co-relation 11705. Up to 3049 conditions per place. [2023-11-06 23:03:15,716 INFO L140 encePairwiseOnDemand]: 468/498 looper letters, 197 selfloop transitions, 50 changer transitions 29/282 dead transitions. [2023-11-06 23:03:15,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 282 transitions, 2315 flow [2023-11-06 23:03:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:03:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:03:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5560 transitions. [2023-11-06 23:03:15,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37215528781793844 [2023-11-06 23:03:15,726 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5560 transitions. [2023-11-06 23:03:15,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5560 transitions. [2023-11-06 23:03:15,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:15,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5560 transitions. [2023-11-06 23:03:15,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.33333333333334) internal successors, (5560), 30 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,753 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,754 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 1135 flow. Second operand 30 states and 5560 transitions. [2023-11-06 23:03:15,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 282 transitions, 2315 flow [2023-11-06 23:03:15,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 282 transitions, 2201 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-11-06 23:03:15,873 INFO L231 Difference]: Finished difference. Result has 200 places, 177 transitions, 1630 flow [2023-11-06 23:03:15,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1630, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2023-11-06 23:03:15,874 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 137 predicate places. [2023-11-06 23:03:15,875 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 1630 flow [2023-11-06 23:03:15,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:15,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 23:03:15,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:03:15,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2118744143, now seen corresponding path program 2 times [2023-11-06 23:03:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112509559] [2023-11-06 23:03:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112509559] [2023-11-06 23:03:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112509559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:03:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562147335] [2023-11-06 23:03:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:19,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:25,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 498 [2023-11-06 23:03:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 1630 flow. Second operand has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 498 [2023-11-06 23:03:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:28,514 INFO L124 PetriNetUnfolderBase]: 2371/4466 cut-off events. [2023-11-06 23:03:28,515 INFO L125 PetriNetUnfolderBase]: For 43651/43655 co-relation queries the response was YES. [2023-11-06 23:03:28,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 4466 events. 2371/4466 cut-off events. For 43651/43655 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 24215 event pairs, 905 based on Foata normal form. 84/4546 useless extension candidates. Maximal degree in co-relation 20217. Up to 3645 conditions per place. [2023-11-06 23:03:28,553 INFO L140 encePairwiseOnDemand]: 468/498 looper letters, 236 selfloop transitions, 50 changer transitions 27/319 dead transitions. [2023-11-06 23:03:28,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 319 transitions, 3265 flow [2023-11-06 23:03:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:03:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:03:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5555 transitions. [2023-11-06 23:03:28,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718206157965194 [2023-11-06 23:03:28,561 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5555 transitions. [2023-11-06 23:03:28,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5555 transitions. [2023-11-06 23:03:28,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:28,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5555 transitions. [2023-11-06 23:03:28,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.16666666666666) internal successors, (5555), 30 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:28,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:28,587 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:28,588 INFO L175 Difference]: Start difference. First operand has 200 places, 177 transitions, 1630 flow. Second operand 30 states and 5555 transitions. [2023-11-06 23:03:28,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 319 transitions, 3265 flow [2023-11-06 23:03:28,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 319 transitions, 3239 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:28,698 INFO L231 Difference]: Finished difference. Result has 254 places, 222 transitions, 2359 flow [2023-11-06 23:03:28,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2359, PETRI_PLACES=254, PETRI_TRANSITIONS=222} [2023-11-06 23:03:28,700 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 191 predicate places. [2023-11-06 23:03:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 222 transitions, 2359 flow [2023-11-06 23:03:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:28,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 23:03:28,701 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:03:28,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1706423911, now seen corresponding path program 3 times [2023-11-06 23:03:28,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:28,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374129723] [2023-11-06 23:03:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:32,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:32,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374129723] [2023-11-06 23:03:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374129723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:32,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:32,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-11-06 23:03:32,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329545390] [2023-11-06 23:03:32,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:32,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:03:32,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:32,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:03:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:03:38,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 498 [2023-11-06 23:03:38,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 222 transitions, 2359 flow. Second operand has 26 states, 26 states have (on average 177.46153846153845) internal successors, (4614), 26 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 498 [2023-11-06 23:03:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:42,780 INFO L124 PetriNetUnfolderBase]: 2681/5087 cut-off events. [2023-11-06 23:03:42,780 INFO L125 PetriNetUnfolderBase]: For 171376/171380 co-relation queries the response was YES. [2023-11-06 23:03:42,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30779 conditions, 5087 events. 2681/5087 cut-off events. For 171376/171380 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 28754 event pairs, 1064 based on Foata normal form. 92/5175 useless extension candidates. Maximal degree in co-relation 30680. Up to 4167 conditions per place. [2023-11-06 23:03:42,837 INFO L140 encePairwiseOnDemand]: 467/498 looper letters, 286 selfloop transitions, 61 changer transitions 25/378 dead transitions. [2023-11-06 23:03:42,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 4577 flow [2023-11-06 23:03:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:03:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 23:03:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5687 transitions. [2023-11-06 23:03:42,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36837673273740124 [2023-11-06 23:03:42,987 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5687 transitions. [2023-11-06 23:03:42,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5687 transitions. [2023-11-06 23:03:42,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:42,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5687 transitions. [2023-11-06 23:03:42,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 183.4516129032258) internal successors, (5687), 31 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 498.0) internal successors, (15936), 32 states have internal predecessors, (15936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,016 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 498.0) internal successors, (15936), 32 states have internal predecessors, (15936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,016 INFO L175 Difference]: Start difference. First operand has 254 places, 222 transitions, 2359 flow. Second operand 31 states and 5687 transitions. [2023-11-06 23:03:43,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 4577 flow [2023-11-06 23:03:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 378 transitions, 4401 flow, removed 86 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:43,273 INFO L231 Difference]: Finished difference. Result has 308 places, 277 transitions, 3157 flow [2023-11-06 23:03:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3157, PETRI_PLACES=308, PETRI_TRANSITIONS=277} [2023-11-06 23:03:43,275 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 245 predicate places. [2023-11-06 23:03:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 277 transitions, 3157 flow [2023-11-06 23:03:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.46153846153845) internal successors, (4614), 26 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 23:03:43,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:03:43,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash -254085255, now seen corresponding path program 4 times [2023-11-06 23:03:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821577749] [2023-11-06 23:03:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821577749] [2023-11-06 23:03:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821577749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:46,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:03:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032083833] [2023-11-06 23:03:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:46,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:51,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 498 [2023-11-06 23:03:51,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 277 transitions, 3157 flow. Second operand has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:51,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 498 [2023-11-06 23:03:51,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:55,819 INFO L124 PetriNetUnfolderBase]: 2977/5651 cut-off events. [2023-11-06 23:03:55,819 INFO L125 PetriNetUnfolderBase]: For 380841/380845 co-relation queries the response was YES. [2023-11-06 23:03:55,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40974 conditions, 5651 events. 2977/5651 cut-off events. For 380841/380845 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 32926 event pairs, 1212 based on Foata normal form. 78/5725 useless extension candidates. Maximal degree in co-relation 40849. Up to 4639 conditions per place. [2023-11-06 23:03:55,884 INFO L140 encePairwiseOnDemand]: 468/498 looper letters, 324 selfloop transitions, 60 changer transitions 28/418 dead transitions. [2023-11-06 23:03:55,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 418 transitions, 5845 flow [2023-11-06 23:03:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:03:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:03:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5556 transitions. [2023-11-06 23:03:55,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718875502008032 [2023-11-06 23:03:55,896 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5556 transitions. [2023-11-06 23:03:55,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5556 transitions. [2023-11-06 23:03:55,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:55,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5556 transitions. [2023-11-06 23:03:55,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.2) internal successors, (5556), 30 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:55,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:55,923 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:55,923 INFO L175 Difference]: Start difference. First operand has 308 places, 277 transitions, 3157 flow. Second operand 30 states and 5556 transitions. [2023-11-06 23:03:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 418 transitions, 5845 flow [2023-11-06 23:03:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 418 transitions, 5513 flow, removed 165 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:56,379 INFO L231 Difference]: Finished difference. Result has 361 places, 319 transitions, 3877 flow [2023-11-06 23:03:56,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3877, PETRI_PLACES=361, PETRI_TRANSITIONS=319} [2023-11-06 23:03:56,380 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 298 predicate places. [2023-11-06 23:03:56,380 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 319 transitions, 3877 flow [2023-11-06 23:03:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:56,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:56,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:56,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 23:03:56,382 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:03:56,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 796636653, now seen corresponding path program 5 times [2023-11-06 23:03:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922288866] [2023-11-06 23:03:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:59,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922288866] [2023-11-06 23:03:59,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922288866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:59,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:59,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:03:59,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436263751] [2023-11-06 23:03:59,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:59,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:04:06,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 498 [2023-11-06 23:04:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 319 transitions, 3877 flow. Second operand has 25 states, 25 states have (on average 178.52) internal successors, (4463), 25 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 498 [2023-11-06 23:04:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:11,556 INFO L124 PetriNetUnfolderBase]: 3266/6214 cut-off events. [2023-11-06 23:04:11,556 INFO L125 PetriNetUnfolderBase]: For 646015/646019 co-relation queries the response was YES. [2023-11-06 23:04:11,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51577 conditions, 6214 events. 3266/6214 cut-off events. For 646015/646019 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 37321 event pairs, 1130 based on Foata normal form. 84/6294 useless extension candidates. Maximal degree in co-relation 51427. Up to 4553 conditions per place. [2023-11-06 23:04:11,648 INFO L140 encePairwiseOnDemand]: 469/498 looper letters, 331 selfloop transitions, 110 changer transitions 29/476 dead transitions. [2023-11-06 23:04:11,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 476 transitions, 7410 flow [2023-11-06 23:04:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 23:04:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 23:04:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5894 transitions. [2023-11-06 23:04:11,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698544176706827 [2023-11-06 23:04:11,661 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5894 transitions. [2023-11-06 23:04:11,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5894 transitions. [2023-11-06 23:04:11,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:11,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5894 transitions. [2023-11-06 23:04:11,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 184.1875) internal successors, (5894), 32 states have internal predecessors, (5894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 498.0) internal successors, (16434), 33 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,688 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 498.0) internal successors, (16434), 33 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,689 INFO L175 Difference]: Start difference. First operand has 361 places, 319 transitions, 3877 flow. Second operand 32 states and 5894 transitions. [2023-11-06 23:04:11,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 476 transitions, 7410 flow [2023-11-06 23:04:12,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 476 transitions, 6952 flow, removed 227 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:12,783 INFO L231 Difference]: Finished difference. Result has 418 places, 372 transitions, 4956 flow [2023-11-06 23:04:12,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4956, PETRI_PLACES=418, PETRI_TRANSITIONS=372} [2023-11-06 23:04:12,784 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 355 predicate places. [2023-11-06 23:04:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 372 transitions, 4956 flow [2023-11-06 23:04:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 178.52) internal successors, (4463), 25 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:12,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:12,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:12,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 23:04:12,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:04:12,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1158869869, now seen corresponding path program 6 times [2023-11-06 23:04:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606926333] [2023-11-06 23:04:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606926333] [2023-11-06 23:04:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606926333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:15,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:04:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793685653] [2023-11-06 23:04:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:04:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:04:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:04:20,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 498 [2023-11-06 23:04:20,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 372 transitions, 4956 flow. Second operand has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:20,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:20,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 498 [2023-11-06 23:04:20,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:26,178 INFO L124 PetriNetUnfolderBase]: 3557/6782 cut-off events. [2023-11-06 23:04:26,178 INFO L125 PetriNetUnfolderBase]: For 1009429/1009433 co-relation queries the response was YES. [2023-11-06 23:04:26,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64478 conditions, 6782 events. 3557/6782 cut-off events. For 1009429/1009433 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 41847 event pairs, 1274 based on Foata normal form. 68/6846 useless extension candidates. Maximal degree in co-relation 64300. Up to 5561 conditions per place. [2023-11-06 23:04:26,283 INFO L140 encePairwiseOnDemand]: 467/498 looper letters, 410 selfloop transitions, 75 changer transitions 31/522 dead transitions. [2023-11-06 23:04:26,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 522 transitions, 9319 flow [2023-11-06 23:04:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:04:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:04:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5566 transitions. [2023-11-06 23:04:26,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37255689424364125 [2023-11-06 23:04:26,292 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5566 transitions. [2023-11-06 23:04:26,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5566 transitions. [2023-11-06 23:04:26,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:26,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5566 transitions. [2023-11-06 23:04:26,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.53333333333333) internal successors, (5566), 30 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:26,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:26,324 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:26,324 INFO L175 Difference]: Start difference. First operand has 418 places, 372 transitions, 4956 flow. Second operand 30 states and 5566 transitions. [2023-11-06 23:04:26,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 522 transitions, 9319 flow [2023-11-06 23:04:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 522 transitions, 8569 flow, removed 364 selfloop flow, removed 4 redundant places. [2023-11-06 23:04:28,148 INFO L231 Difference]: Finished difference. Result has 467 places, 417 transitions, 5745 flow [2023-11-06 23:04:28,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5745, PETRI_PLACES=467, PETRI_TRANSITIONS=417} [2023-11-06 23:04:28,149 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 404 predicate places. [2023-11-06 23:04:28,149 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 417 transitions, 5745 flow [2023-11-06 23:04:28,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.52) internal successors, (4488), 25 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:28,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:28,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 23:04:28,151 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:04:28,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash -400370769, now seen corresponding path program 7 times [2023-11-06 23:04:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941604151] [2023-11-06 23:04:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941604151] [2023-11-06 23:04:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941604151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-06 23:04:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929360653] [2023-11-06 23:04:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:04:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:04:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:04:36,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 498 [2023-11-06 23:04:36,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 417 transitions, 5745 flow. Second operand has 25 states, 25 states have (on average 178.52) internal successors, (4463), 25 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:36,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:36,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 498 [2023-11-06 23:04:36,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:41,779 INFO L124 PetriNetUnfolderBase]: 3793/7268 cut-off events. [2023-11-06 23:04:41,779 INFO L125 PetriNetUnfolderBase]: For 1280716/1280720 co-relation queries the response was YES. [2023-11-06 23:04:41,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 7268 events. 3793/7268 cut-off events. For 1280716/1280720 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 46005 event pairs, 1239 based on Foata normal form. 68/7332 useless extension candidates. Maximal degree in co-relation 74142. Up to 4965 conditions per place. [2023-11-06 23:04:41,904 INFO L140 encePairwiseOnDemand]: 467/498 looper letters, 428 selfloop transitions, 108 changer transitions 35/577 dead transitions. [2023-11-06 23:04:41,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 577 transitions, 10997 flow [2023-11-06 23:04:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:04:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:04:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5553 transitions. [2023-11-06 23:04:41,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716867469879518 [2023-11-06 23:04:41,911 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5553 transitions. [2023-11-06 23:04:41,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5553 transitions. [2023-11-06 23:04:41,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:41,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5553 transitions. [2023-11-06 23:04:41,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.1) internal successors, (5553), 30 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,045 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 498.0) internal successors, (15438), 31 states have internal predecessors, (15438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:42,045 INFO L175 Difference]: Start difference. First operand has 467 places, 417 transitions, 5745 flow. Second operand 30 states and 5553 transitions. [2023-11-06 23:04:42,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 577 transitions, 10997 flow [2023-11-06 23:04:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 577 transitions, 9831 flow, removed 560 selfloop flow, removed 9 redundant places. [2023-11-06 23:04:44,240 INFO L231 Difference]: Finished difference. Result has 509 places, 458 transitions, 6402 flow [2023-11-06 23:04:44,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=4945, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6402, PETRI_PLACES=509, PETRI_TRANSITIONS=458} [2023-11-06 23:04:44,241 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 446 predicate places. [2023-11-06 23:04:44,241 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 458 transitions, 6402 flow [2023-11-06 23:04:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 178.52) internal successors, (4463), 25 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 23:04:44,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:04:44,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash 283836927, now seen corresponding path program 8 times [2023-11-06 23:04:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716666704] [2023-11-06 23:04:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:46,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716666704] [2023-11-06 23:04:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716666704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:46,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:46,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-06 23:04:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346906627] [2023-11-06 23:04:46,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:46,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:04:46,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:04:46,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:04:52,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 498 [2023-11-06 23:04:52,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 458 transitions, 6402 flow. Second operand has 24 states, 24 states have (on average 180.58333333333334) internal successors, (4334), 24 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:52,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:52,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 498 [2023-11-06 23:04:52,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:00,000 INFO L124 PetriNetUnfolderBase]: 4673/8928 cut-off events. [2023-11-06 23:05:00,000 INFO L125 PetriNetUnfolderBase]: For 1642583/1642589 co-relation queries the response was YES. [2023-11-06 23:05:00,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94334 conditions, 8928 events. 4673/8928 cut-off events. For 1642583/1642589 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 59195 event pairs, 1500 based on Foata normal form. 66/8990 useless extension candidates. Maximal degree in co-relation 94114. Up to 5743 conditions per place. [2023-11-06 23:05:00,220 INFO L140 encePairwiseOnDemand]: 467/498 looper letters, 489 selfloop transitions, 194 changer transitions 40/729 dead transitions. [2023-11-06 23:05:00,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 729 transitions, 15044 flow [2023-11-06 23:05:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 23:05:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 23:05:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 7097 transitions. [2023-11-06 23:05:00,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750264214753752 [2023-11-06 23:05:00,232 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 7097 transitions. [2023-11-06 23:05:00,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 7097 transitions. [2023-11-06 23:05:00,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:00,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 7097 transitions. [2023-11-06 23:05:00,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 186.76315789473685) internal successors, (7097), 38 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 498.0) internal successors, (19422), 39 states have internal predecessors, (19422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,261 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 498.0) internal successors, (19422), 39 states have internal predecessors, (19422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:00,261 INFO L175 Difference]: Start difference. First operand has 509 places, 458 transitions, 6402 flow. Second operand 38 states and 7097 transitions. [2023-11-06 23:05:00,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 729 transitions, 15044 flow [2023-11-06 23:05:03,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 729 transitions, 13385 flow, removed 801 selfloop flow, removed 5 redundant places. [2023-11-06 23:05:03,740 INFO L231 Difference]: Finished difference. Result has 571 places, 568 transitions, 8650 flow [2023-11-06 23:05:03,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8650, PETRI_PLACES=571, PETRI_TRANSITIONS=568} [2023-11-06 23:05:03,741 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 508 predicate places. [2023-11-06 23:05:03,741 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 568 transitions, 8650 flow [2023-11-06 23:05:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 180.58333333333334) internal successors, (4334), 24 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:03,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:03,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 23:05:03,742 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:05:03,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash 362799017, now seen corresponding path program 9 times [2023-11-06 23:05:03,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:03,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481058495] [2023-11-06 23:05:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat