./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:57,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:57,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:48:57,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:57,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:57,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:57,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:57,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:57,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:57,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:57,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:57,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:57,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:57,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:57,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:48:57,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:57,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:57,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:57,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:57,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:48:57,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:57,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:48:57,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:57,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:48:57,293 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:57,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:57,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:57,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:57,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:57,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:57,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:57,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:48:57,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:57,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:57,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:57,299 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:48:57,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:57,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:57,300 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:57,300 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_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2023-11-19 07:48:57,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:57,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:57,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:57,645 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:57,646 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:57,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-19 07:49:00,786 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:00,990 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:00,991 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-19 07:49:01,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/data/fd236e153/1068d7bde9ef4093a236c1f022104d68/FLAG16fb6fbaa [2023-11-19 07:49:01,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/data/fd236e153/1068d7bde9ef4093a236c1f022104d68 [2023-11-19 07:49:01,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:01,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:01,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:01,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:01,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:01,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afcb988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01, skipping insertion in model container [2023-11-19 07:49:01,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,062 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:01,260 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_d9767be1-694b-4bb2-992e-cc174c241a6a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3331,3344] [2023-11-19 07:49:01,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:01,294 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:01,322 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_d9767be1-694b-4bb2-992e-cc174c241a6a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3331,3344] [2023-11-19 07:49:01,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:01,348 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:01,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01 WrapperNode [2023-11-19 07:49:01,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:01,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:01,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:01,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:01,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,407 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 299 [2023-11-19 07:49:01,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:01,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:01,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:01,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:01,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,437 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,443 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,448 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:01,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:01,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:01,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:01,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (1/1) ... [2023-11-19 07:49:01,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:01,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:49:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:49:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:49:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:49:01,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:49:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:49:01,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:49:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:49:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:01,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:49:01,549 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:49:01,758 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:01,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:02,396 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:02,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:02,414 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:49:02,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:02 BoogieIcfgContainer [2023-11-19 07:49:02,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:02,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:02,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:02,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:02,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:01" (1/3) ... [2023-11-19 07:49:02,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132bdaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:02, skipping insertion in model container [2023-11-19 07:49:02,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:01" (2/3) ... [2023-11-19 07:49:02,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132bdaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:02, skipping insertion in model container [2023-11-19 07:49:02,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:02" (3/3) ... [2023-11-19 07:49:02,449 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-11-19 07:49:02,458 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:49:02,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:02,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:49:02,470 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:49:02,589 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:49:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 367 places, 388 transitions, 790 flow [2023-11-19 07:49:02,910 INFO L124 PetriNetUnfolderBase]: 28/386 cut-off events. [2023-11-19 07:49:02,910 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 386 events. 28/386 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 370 event pairs, 0 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 306. Up to 2 conditions per place. [2023-11-19 07:49:02,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 367 places, 388 transitions, 790 flow [2023-11-19 07:49:02,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 377 transitions, 766 flow [2023-11-19 07:49:02,937 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:03,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 377 transitions, 766 flow [2023-11-19 07:49:03,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 377 transitions, 766 flow [2023-11-19 07:49:03,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 377 transitions, 766 flow [2023-11-19 07:49:03,149 INFO L124 PetriNetUnfolderBase]: 28/377 cut-off events. [2023-11-19 07:49:03,149 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:03,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 377 events. 28/377 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. 0/349 useless extension candidates. Maximal degree in co-relation 306. Up to 2 conditions per place. [2023-11-19 07:49:03,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 7700 [2023-11-19 07:49:18,661 INFO L134 LiptonReduction]: Checked pairs total: 8114 [2023-11-19 07:49:18,663 INFO L136 LiptonReduction]: Total number of compositions: 449 [2023-11-19 07:49:18,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:18,708 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@344c7abd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:18,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:49:18,718 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:18,718 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-19 07:49:18,718 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:18,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:18,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:18,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1412357835, now seen corresponding path program 1 times [2023-11-19 07:49:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345920343] [2023-11-19 07:49:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:19,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:19,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345920343] [2023-11-19 07:49:19,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345920343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:19,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:19,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894600644] [2023-11-19 07:49:19,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:19,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 837 [2023-11-19 07:49:19,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:19,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 837 [2023-11-19 07:49:19,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:19,355 INFO L124 PetriNetUnfolderBase]: 61/120 cut-off events. [2023-11-19 07:49:19,356 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:49:19,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 120 events. 61/120 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 296 event pairs, 33 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 220. Up to 91 conditions per place. [2023-11-19 07:49:19,359 INFO L140 encePairwiseOnDemand]: 833/837 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-19 07:49:19,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 139 flow [2023-11-19 07:49:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1100 transitions. [2023-11-19 07:49:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43807248108323377 [2023-11-19 07:49:19,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1100 transitions. [2023-11-19 07:49:19,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1100 transitions. [2023-11-19 07:49:19,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:19,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1100 transitions. [2023-11-19 07:49:19,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,424 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 1100 transitions. [2023-11-19 07:49:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 139 flow [2023-11-19 07:49:19,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:49:19,431 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 74 flow [2023-11-19 07:49:19,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:49:19,437 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-11-19 07:49:19,438 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 74 flow [2023-11-19 07:49:19,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:19,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:19,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:49:19,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:19,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -257194936, now seen corresponding path program 1 times [2023-11-19 07:49:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92033162] [2023-11-19 07:49:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:19,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92033162] [2023-11-19 07:49:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92033162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:19,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:19,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:19,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841459308] [2023-11-19 07:49:19,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:19,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:19,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:19,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 837 [2023-11-19 07:49:19,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:19,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:19,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 837 [2023-11-19 07:49:19,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:19,985 INFO L124 PetriNetUnfolderBase]: 61/121 cut-off events. [2023-11-19 07:49:19,985 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:49:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 121 events. 61/121 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 281 event pairs, 45 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 154. Up to 121 conditions per place. [2023-11-19 07:49:19,989 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 07:49:19,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 132 flow [2023-11-19 07:49:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1075 transitions. [2023-11-19 07:49:20,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281162883313421 [2023-11-19 07:49:20,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1075 transitions. [2023-11-19 07:49:20,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1075 transitions. [2023-11-19 07:49:20,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:20,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1075 transitions. [2023-11-19 07:49:20,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.3333333333333) internal successors, (1075), 3 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,020 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 74 flow. Second operand 3 states and 1075 transitions. [2023-11-19 07:49:20,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 132 flow [2023-11-19 07:49:20,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:20,028 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 80 flow [2023-11-19 07:49:20,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-11-19 07:49:20,029 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-11-19 07:49:20,031 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 80 flow [2023-11-19 07:49:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:20,033 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] [2023-11-19 07:49:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:49:20,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:20,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -461357633, now seen corresponding path program 1 times [2023-11-19 07:49:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893869072] [2023-11-19 07:49:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:49:20,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:20,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893869072] [2023-11-19 07:49:20,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893869072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:20,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:20,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:20,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094601890] [2023-11-19 07:49:20,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:20,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:20,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:20,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 837 [2023-11-19 07:49:20,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:20,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 837 [2023-11-19 07:49:20,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:20,534 INFO L124 PetriNetUnfolderBase]: 61/122 cut-off events. [2023-11-19 07:49:20,534 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:49:20,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 122 events. 61/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 281 event pairs, 45 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 281. Up to 120 conditions per place. [2023-11-19 07:49:20,536 INFO L140 encePairwiseOnDemand]: 832/837 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-19 07:49:20,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 140 flow [2023-11-19 07:49:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1425 transitions. [2023-11-19 07:49:20,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42562724014336917 [2023-11-19 07:49:20,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1425 transitions. [2023-11-19 07:49:20,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1425 transitions. [2023-11-19 07:49:20,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:20,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1425 transitions. [2023-11-19 07:49:20,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,569 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,570 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 80 flow. Second operand 4 states and 1425 transitions. [2023-11-19 07:49:20,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 140 flow [2023-11-19 07:49:20,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:20,574 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 94 flow [2023-11-19 07:49:20,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-19 07:49:20,576 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-11-19 07:49:20,581 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 94 flow [2023-11-19 07:49:20,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:20,584 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] [2023-11-19 07:49:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:49:20,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash -26705222, now seen corresponding path program 1 times [2023-11-19 07:49:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380082523] [2023-11-19 07:49:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:49:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380082523] [2023-11-19 07:49:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380082523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865349345] [2023-11-19 07:49:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:20,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:20,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:20,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:20,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:49:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:21,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:49:21,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:49:21,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865349345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:21,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 07:49:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53114954] [2023-11-19 07:49:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:21,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:21,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:49:21,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 837 [2023-11-19 07:49:21,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:21,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:21,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 837 [2023-11-19 07:49:21,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:21,447 INFO L124 PetriNetUnfolderBase]: 61/123 cut-off events. [2023-11-19 07:49:21,449 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:49:21,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 123 events. 61/123 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 281 event pairs, 45 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 281. Up to 122 conditions per place. [2023-11-19 07:49:21,450 INFO L140 encePairwiseOnDemand]: 833/837 looper letters, 27 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2023-11-19 07:49:21,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 156 flow [2023-11-19 07:49:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1424 transitions. [2023-11-19 07:49:21,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253285543608124 [2023-11-19 07:49:21,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1424 transitions. [2023-11-19 07:49:21,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1424 transitions. [2023-11-19 07:49:21,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:21,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1424 transitions. [2023-11-19 07:49:21,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:21,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:21,478 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:21,478 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 94 flow. Second operand 4 states and 1424 transitions. [2023-11-19 07:49:21,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 156 flow [2023-11-19 07:49:21,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:21,483 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 107 flow [2023-11-19 07:49:21,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-19 07:49:21,485 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-11-19 07:49:21,486 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 107 flow [2023-11-19 07:49:21,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 354.25) internal successors, (1417), 4 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:21,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:21,488 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] [2023-11-19 07:49:21,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:49:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9767be1-694b-4bb2-992e-cc174c241a6a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:21,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1802572393, now seen corresponding path program 1 times [2023-11-19 07:49:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311485274] [2023-11-19 07:49:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:49:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:21,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311485274] [2023-11-19 07:49:21,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311485274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:21,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:21,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:21,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011147138] [2023-11-19 07:49:21,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:21,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:22,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 837 [2023-11-19 07:49:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 354.5) internal successors, (1418), 4 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:22,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 837 [2023-11-19 07:49:22,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:22,175 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2023-11-19 07:49:22,175 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:49:22,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 124 events. 61/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 281 event pairs, 45 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 288. Up to 123 conditions per place. [2023-11-19 07:49:22,177 INFO L140 encePairwiseOnDemand]: 833/837 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-19 07:49:22,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 171 flow [2023-11-19 07:49:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1424 transitions. [2023-11-19 07:49:22,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253285543608124 [2023-11-19 07:49:22,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1424 transitions. [2023-11-19 07:49:22,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1424 transitions. [2023-11-19 07:49:22,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:22,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1424 transitions. [2023-11-19 07:49:22,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,208 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 107 flow. Second operand 4 states and 1424 transitions. [2023-11-19 07:49:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 171 flow [2023-11-19 07:49:22,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 165 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:22,213 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-11-19 07:49:22,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 07:49:22,217 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-11-19 07:49:22,217 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-11-19 07:49:22,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 354.5) internal successors, (1418), 4 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:22,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:22,219 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] [2023-11-19 07:49:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:22,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:22,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -704251839, now seen corresponding path program 1 times [2023-11-19 07:49:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127136700] [2023-11-19 07:49:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:23,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:23,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127136700] [2023-11-19 07:49:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127136700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:23,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:23,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:49:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807782005] [2023-11-19 07:49:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:23,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:23,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 837 [2023-11-19 07:49:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:23,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:23,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 837 [2023-11-19 07:49:23,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:24,284 INFO L124 PetriNetUnfolderBase]: 61/131 cut-off events. [2023-11-19 07:49:24,285 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:49:24,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 131 events. 61/131 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 327 event pairs, 21 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 307. Up to 77 conditions per place. [2023-11-19 07:49:24,287 INFO L140 encePairwiseOnDemand]: 833/837 looper letters, 39 selfloop transitions, 1 changer transitions 9/49 dead transitions. [2023-11-19 07:49:24,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 264 flow [2023-11-19 07:49:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1749 transitions. [2023-11-19 07:49:24,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41792114695340504 [2023-11-19 07:49:24,306 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1749 transitions. [2023-11-19 07:49:24,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1749 transitions. [2023-11-19 07:49:24,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:24,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1749 transitions. [2023-11-19 07:49:24,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.8) internal successors, (1749), 5 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:24,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:24,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:24,360 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 5 states and 1749 transitions. [2023-11-19 07:49:24,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 264 flow [2023-11-19 07:49:24,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 258 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:24,377 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 120 flow [2023-11-19 07:49:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-11-19 07:49:24,383 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-11-19 07:49:24,383 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 120 flow [2023-11-19 07:49:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:24,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:24,385 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] [2023-11-19 07:49:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:49:24,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:24,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1302238433, now seen corresponding path program 2 times [2023-11-19 07:49:24,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:24,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185584495] [2023-11-19 07:49:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:25,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185584495] [2023-11-19 07:49:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185584495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:25,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:25,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:49:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116859981] [2023-11-19 07:49:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:25,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 837 [2023-11-19 07:49:25,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:25,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:25,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 837 [2023-11-19 07:49:25,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:26,077 INFO L124 PetriNetUnfolderBase]: 63/148 cut-off events. [2023-11-19 07:49:26,077 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-19 07:49:26,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 148 events. 63/148 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 40 based on Foata normal form. 1/148 useless extension candidates. Maximal degree in co-relation 394. Up to 113 conditions per place. [2023-11-19 07:49:26,079 INFO L140 encePairwiseOnDemand]: 832/837 looper letters, 37 selfloop transitions, 5 changer transitions 6/48 dead transitions. [2023-11-19 07:49:26,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 268 flow [2023-11-19 07:49:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1749 transitions. [2023-11-19 07:49:26,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41792114695340504 [2023-11-19 07:49:26,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1749 transitions. [2023-11-19 07:49:26,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1749 transitions. [2023-11-19 07:49:26,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:26,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1749 transitions. [2023-11-19 07:49:26,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.8) internal successors, (1749), 5 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:26,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:26,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:26,108 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 120 flow. Second operand 5 states and 1749 transitions. [2023-11-19 07:49:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 268 flow [2023-11-19 07:49:26,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 257 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-19 07:49:26,112 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 147 flow [2023-11-19 07:49:26,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-19 07:49:26,113 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-19 07:49:26,113 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 147 flow [2023-11-19 07:49:26,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:26,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:26,123 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] [2023-11-19 07:49:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:49:26,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:26,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -667978433, now seen corresponding path program 3 times [2023-11-19 07:49:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:26,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198193471] [2023-11-19 07:49:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:26,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:27,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198193471] [2023-11-19 07:49:27,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198193471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:27,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:49:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013389948] [2023-11-19 07:49:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:27,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:27,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 837 [2023-11-19 07:49:27,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:27,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:27,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 837 [2023-11-19 07:49:27,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:27,564 INFO L124 PetriNetUnfolderBase]: 60/139 cut-off events. [2023-11-19 07:49:27,564 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-19 07:49:27,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 139 events. 60/139 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 380 event pairs, 42 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 419. Up to 121 conditions per place. [2023-11-19 07:49:27,566 INFO L140 encePairwiseOnDemand]: 832/837 looper letters, 30 selfloop transitions, 4 changer transitions 9/43 dead transitions. [2023-11-19 07:49:27,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 264 flow [2023-11-19 07:49:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1743 transitions. [2023-11-19 07:49:27,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164874551971326 [2023-11-19 07:49:27,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1743 transitions. [2023-11-19 07:49:27,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1743 transitions. [2023-11-19 07:49:27,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:27,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1743 transitions. [2023-11-19 07:49:27,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.6) internal successors, (1743), 5 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:27,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:27,591 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 837.0) internal successors, (5022), 6 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:27,591 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 147 flow. Second operand 5 states and 1743 transitions. [2023-11-19 07:49:27,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 264 flow [2023-11-19 07:49:27,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 262 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:27,595 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 161 flow [2023-11-19 07:49:27,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-19 07:49:27,598 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-11-19 07:49:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 161 flow [2023-11-19 07:49:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:27,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:27,599 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] [2023-11-19 07:49:27,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:49:27,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:27,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1182625430, now seen corresponding path program 1 times [2023-11-19 07:49:27,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124464370] [2023-11-19 07:49:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:28,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124464370] [2023-11-19 07:49:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124464370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:49:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451685193] [2023-11-19 07:49:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:28,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:28,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:49:29,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 837 [2023-11-19 07:49:29,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 161 flow. Second operand has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:29,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 837 [2023-11-19 07:49:29,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:29,888 INFO L124 PetriNetUnfolderBase]: 89/219 cut-off events. [2023-11-19 07:49:29,888 INFO L125 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2023-11-19 07:49:29,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 219 events. 89/219 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 894 event pairs, 17 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 697. Up to 97 conditions per place. [2023-11-19 07:49:29,891 INFO L140 encePairwiseOnDemand]: 829/837 looper letters, 46 selfloop transitions, 8 changer transitions 12/66 dead transitions. [2023-11-19 07:49:29,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 422 flow [2023-11-19 07:49:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2674 transitions. [2023-11-19 07:49:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39934289127837513 [2023-11-19 07:49:29,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2674 transitions. [2023-11-19 07:49:29,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2674 transitions. [2023-11-19 07:49:29,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:29,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2674 transitions. [2023-11-19 07:49:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.25) internal successors, (2674), 8 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,931 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,931 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 161 flow. Second operand 8 states and 2674 transitions. [2023-11-19 07:49:29,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 422 flow [2023-11-19 07:49:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 402 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 07:49:29,936 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 193 flow [2023-11-19 07:49:29,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=193, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-11-19 07:49:29,937 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-11-19 07:49:29,938 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 193 flow [2023-11-19 07:49:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:29,939 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] [2023-11-19 07:49:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:49:29,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash -486724634, now seen corresponding path program 2 times [2023-11-19 07:49:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675682931] [2023-11-19 07:49:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675682931] [2023-11-19 07:49:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675682931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:31,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:49:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036837491] [2023-11-19 07:49:31,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:31,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:49:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:49:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:49:31,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 837 [2023-11-19 07:49:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 340.8333333333333) internal successors, (2045), 6 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:31,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 837 [2023-11-19 07:49:31,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:31,997 INFO L124 PetriNetUnfolderBase]: 92/232 cut-off events. [2023-11-19 07:49:31,997 INFO L125 PetriNetUnfolderBase]: For 535/535 co-relation queries the response was YES. [2023-11-19 07:49:31,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 232 events. 92/232 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 958 event pairs, 33 based on Foata normal form. 1/232 useless extension candidates. Maximal degree in co-relation 790. Up to 126 conditions per place. [2023-11-19 07:49:32,000 INFO L140 encePairwiseOnDemand]: 832/837 looper letters, 42 selfloop transitions, 2 changer transitions 13/57 dead transitions. [2023-11-19 07:49:32,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 376 flow [2023-11-19 07:49:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:49:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:49:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2070 transitions. [2023-11-19 07:49:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2023-11-19 07:49:32,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2070 transitions. [2023-11-19 07:49:32,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2070 transitions. [2023-11-19 07:49:32,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:32,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2070 transitions. [2023-11-19 07:49:32,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 345.0) internal successors, (2070), 6 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,031 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 193 flow. Second operand 6 states and 2070 transitions. [2023-11-19 07:49:32,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 376 flow [2023-11-19 07:49:32,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 360 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-19 07:49:32,038 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 195 flow [2023-11-19 07:49:32,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2023-11-19 07:49:32,039 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-19 07:49:32,040 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 195 flow [2023-11-19 07:49:32,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 340.8333333333333) internal successors, (2045), 6 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:32,041 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] [2023-11-19 07:49:32,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:49:32,042 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:32,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1327644280, now seen corresponding path program 3 times [2023-11-19 07:49:32,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:32,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143062397] [2023-11-19 07:49:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:32,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143062397] [2023-11-19 07:49:33,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143062397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:33,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:49:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487154446] [2023-11-19 07:49:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:49:34,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 837 [2023-11-19 07:49:34,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 195 flow. Second operand has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:34,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 837 [2023-11-19 07:49:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:34,437 INFO L124 PetriNetUnfolderBase]: 86/210 cut-off events. [2023-11-19 07:49:34,437 INFO L125 PetriNetUnfolderBase]: For 880/880 co-relation queries the response was YES. [2023-11-19 07:49:34,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 210 events. 86/210 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 833 event pairs, 23 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 776. Up to 95 conditions per place. [2023-11-19 07:49:34,439 INFO L140 encePairwiseOnDemand]: 829/837 looper letters, 39 selfloop transitions, 9 changer transitions 15/63 dead transitions. [2023-11-19 07:49:34,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 448 flow [2023-11-19 07:49:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2671 transitions. [2023-11-19 07:49:34,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39889486260454005 [2023-11-19 07:49:34,452 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2671 transitions. [2023-11-19 07:49:34,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2671 transitions. [2023-11-19 07:49:34,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:34,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2671 transitions. [2023-11-19 07:49:34,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 333.875) internal successors, (2671), 8 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,476 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,477 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 195 flow. Second operand 8 states and 2671 transitions. [2023-11-19 07:49:34,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 448 flow [2023-11-19 07:49:34,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 434 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-19 07:49:34,482 INFO L231 Difference]: Finished difference. Result has 57 places, 37 transitions, 212 flow [2023-11-19 07:49:34,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=57, PETRI_TRANSITIONS=37} [2023-11-19 07:49:34,484 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2023-11-19 07:49:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 37 transitions, 212 flow [2023-11-19 07:49:34,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:34,486 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] [2023-11-19 07:49:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:49:34,486 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -743138914, now seen corresponding path program 4 times [2023-11-19 07:49:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557871287] [2023-11-19 07:49:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:35,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557871287] [2023-11-19 07:49:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557871287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:35,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:35,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:49:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89098423] [2023-11-19 07:49:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:35,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:49:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:49:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:49:35,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 837 [2023-11-19 07:49:35,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 37 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 340.8333333333333) internal successors, (2045), 6 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:35,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 837 [2023-11-19 07:49:35,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:36,394 INFO L124 PetriNetUnfolderBase]: 95/249 cut-off events. [2023-11-19 07:49:36,394 INFO L125 PetriNetUnfolderBase]: For 600/600 co-relation queries the response was YES. [2023-11-19 07:49:36,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 249 events. 95/249 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1114 event pairs, 37 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 888. Up to 173 conditions per place. [2023-11-19 07:49:36,397 INFO L140 encePairwiseOnDemand]: 831/837 looper letters, 35 selfloop transitions, 6 changer transitions 21/62 dead transitions. [2023-11-19 07:49:36,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 455 flow [2023-11-19 07:49:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:49:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:49:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2073 transitions. [2023-11-19 07:49:36,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127837514934289 [2023-11-19 07:49:36,407 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2073 transitions. [2023-11-19 07:49:36,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2073 transitions. [2023-11-19 07:49:36,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:36,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2073 transitions. [2023-11-19 07:49:36,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 345.5) internal successors, (2073), 6 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,431 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 837.0) internal successors, (5859), 7 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,432 INFO L175 Difference]: Start difference. First operand has 57 places, 37 transitions, 212 flow. Second operand 6 states and 2073 transitions. [2023-11-19 07:49:36,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 455 flow [2023-11-19 07:49:36,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 423 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-19 07:49:36,439 INFO L231 Difference]: Finished difference. Result has 57 places, 37 transitions, 214 flow [2023-11-19 07:49:36,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=37} [2023-11-19 07:49:36,441 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2023-11-19 07:49:36,441 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 37 transitions, 214 flow [2023-11-19 07:49:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 340.8333333333333) internal successors, (2045), 6 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:36,442 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] [2023-11-19 07:49:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:49:36,443 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:36,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 642895232, now seen corresponding path program 5 times [2023-11-19 07:49:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:36,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726190424] [2023-11-19 07:49:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726190424] [2023-11-19 07:49:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726190424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:37,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:49:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203408089] [2023-11-19 07:49:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:49:38,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 837 [2023-11-19 07:49:38,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 37 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:38,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 837 [2023-11-19 07:49:38,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:38,523 INFO L124 PetriNetUnfolderBase]: 69/174 cut-off events. [2023-11-19 07:49:38,524 INFO L125 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2023-11-19 07:49:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 174 events. 69/174 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 event pairs, 27 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2023-11-19 07:49:38,526 INFO L140 encePairwiseOnDemand]: 830/837 looper letters, 39 selfloop transitions, 4 changer transitions 12/55 dead transitions. [2023-11-19 07:49:38,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 387 flow [2023-11-19 07:49:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2661 transitions. [2023-11-19 07:49:38,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974014336917563 [2023-11-19 07:49:38,539 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2661 transitions. [2023-11-19 07:49:38,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2661 transitions. [2023-11-19 07:49:38,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:38,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2661 transitions. [2023-11-19 07:49:38,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 332.625) internal successors, (2661), 8 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,565 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,565 INFO L175 Difference]: Start difference. First operand has 57 places, 37 transitions, 214 flow. Second operand 8 states and 2661 transitions. [2023-11-19 07:49:38,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 387 flow [2023-11-19 07:49:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 354 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-19 07:49:38,571 INFO L231 Difference]: Finished difference. Result has 57 places, 36 transitions, 194 flow [2023-11-19 07:49:38,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=194, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2023-11-19 07:49:38,573 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2023-11-19 07:49:38,573 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 194 flow [2023-11-19 07:49:38,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 329.55555555555554) internal successors, (2966), 9 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:38,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:38,574 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] [2023-11-19 07:49:38,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:49:38,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:38,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash -874888645, now seen corresponding path program 4 times [2023-11-19 07:49:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:38,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143602861] [2023-11-19 07:49:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143602861] [2023-11-19 07:49:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143602861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:39,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:39,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:49:39,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166411820] [2023-11-19 07:49:39,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:39,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:49:40,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 837 [2023-11-19 07:49:40,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 194 flow. Second operand has 9 states, 9 states have (on average 333.55555555555554) internal successors, (3002), 9 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:40,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:40,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 837 [2023-11-19 07:49:40,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:40,705 INFO L124 PetriNetUnfolderBase]: 47/125 cut-off events. [2023-11-19 07:49:40,705 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2023-11-19 07:49:40,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 125 events. 47/125 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 355 event pairs, 27 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 478. Up to 72 conditions per place. [2023-11-19 07:49:40,707 INFO L140 encePairwiseOnDemand]: 831/837 looper letters, 37 selfloop transitions, 5 changer transitions 8/50 dead transitions. [2023-11-19 07:49:40,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 354 flow [2023-11-19 07:49:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:49:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2360 transitions. [2023-11-19 07:49:40,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40279911247653183 [2023-11-19 07:49:40,746 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2360 transitions. [2023-11-19 07:49:40,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2360 transitions. [2023-11-19 07:49:40,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:40,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2360 transitions. [2023-11-19 07:49:40,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.14285714285717) internal successors, (2360), 7 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:40,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 837.0) internal successors, (6696), 8 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:40,767 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 837.0) internal successors, (6696), 8 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:40,768 INFO L175 Difference]: Start difference. First operand has 57 places, 36 transitions, 194 flow. Second operand 7 states and 2360 transitions. [2023-11-19 07:49:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 354 flow [2023-11-19 07:49:40,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 318 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-19 07:49:40,774 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 168 flow [2023-11-19 07:49:40,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-11-19 07:49:40,776 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2023-11-19 07:49:40,776 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 168 flow [2023-11-19 07:49:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 333.55555555555554) internal successors, (3002), 9 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:40,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:40,777 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] [2023-11-19 07:49:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:49:40,778 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:40,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash -145819518, now seen corresponding path program 6 times [2023-11-19 07:49:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:40,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998137272] [2023-11-19 07:49:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:49:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:41,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998137272] [2023-11-19 07:49:41,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998137272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:41,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:41,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:49:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203900331] [2023-11-19 07:49:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:49:42,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 837 [2023-11-19 07:49:42,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 329.3) internal successors, (3293), 10 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:42,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:42,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 837 [2023-11-19 07:49:42,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:43,088 INFO L124 PetriNetUnfolderBase]: 40/112 cut-off events. [2023-11-19 07:49:43,088 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-19 07:49:43,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 112 events. 40/112 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 313 event pairs, 15 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 410. Up to 54 conditions per place. [2023-11-19 07:49:43,090 INFO L140 encePairwiseOnDemand]: 830/837 looper letters, 32 selfloop transitions, 5 changer transitions 9/46 dead transitions. [2023-11-19 07:49:43,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 300 flow [2023-11-19 07:49:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2655 transitions. [2023-11-19 07:49:43,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396505376344086 [2023-11-19 07:49:43,104 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2655 transitions. [2023-11-19 07:49:43,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2655 transitions. [2023-11-19 07:49:43,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:43,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2655 transitions. [2023-11-19 07:49:43,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 331.875) internal successors, (2655), 8 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:43,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:43,130 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 837.0) internal successors, (7533), 9 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:43,130 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 168 flow. Second operand 8 states and 2655 transitions. [2023-11-19 07:49:43,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 300 flow [2023-11-19 07:49:43,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 286 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-19 07:49:43,134 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 170 flow [2023-11-19 07:49:43,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-11-19 07:49:43,136 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-19 07:49:43,137 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 170 flow [2023-11-19 07:49:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 329.3) internal successors, (3293), 10 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:43,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:43,139 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] [2023-11-19 07:49:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:49:43,139 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:43,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1611147401, now seen corresponding path program 5 times [2023-11-19 07:49:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99397617] [2023-11-19 07:49:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat