./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/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 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:41,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:42,035 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:04:42,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:42,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:42,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:42,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:42,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:42,084 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:42,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:42,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:42,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:42,087 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:42,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:42,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:04:42,088 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:42,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:42,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:42,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:42,091 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:04:42,091 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:42,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:04:42,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:42,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:04:42,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:42,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:42,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:42,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:42,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:42,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:42,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:42,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:04:42,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:42,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:42,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:42,100 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:04:42,100 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:42,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:42,101 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:42,102 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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2023-11-19 08:04:42,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:42,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:42,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:42,423 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:42,424 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:42,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-19 08:04:45,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:46,015 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:46,016 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-19 08:04:46,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/data/349aee8d5/2e30dcc1e8764d248b1a8eb7af9970be/FLAG82851d98f [2023-11-19 08:04:46,047 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/data/349aee8d5/2e30dcc1e8764d248b1a8eb7af9970be [2023-11-19 08:04:46,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:46,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:46,053 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:46,054 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:46,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:46,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db32639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46, skipping insertion in model container [2023-11-19 08:04:46,062 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,091 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:46,293 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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-19 08:04:46,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:46,312 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:46,343 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_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2023-11-19 08:04:46,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:46,354 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:04:46,355 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:04:46,364 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:46,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46 WrapperNode [2023-11-19 08:04:46,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:46,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:46,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:46,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:46,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,386 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,418 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 150 [2023-11-19 08:04:46,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:46,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:46,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:46,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:46,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:46,498 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:46,498 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:46,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:46,503 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:46,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:46,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:04:46,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:04:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:04:46,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:04:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:04:46,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:04:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:04:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:04:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:04:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:04:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:46,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:04:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:04:46,588 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 08:04:46,709 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:46,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:47,082 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:47,209 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:47,215 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:04:47,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:47 BoogieIcfgContainer [2023-11-19 08:04:47,220 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:47,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:47,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:47,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:47,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:46" (1/3) ... [2023-11-19 08:04:47,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342fc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:47, skipping insertion in model container [2023-11-19 08:04:47,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46" (2/3) ... [2023-11-19 08:04:47,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342fc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:47, skipping insertion in model container [2023-11-19 08:04:47,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:47" (3/3) ... [2023-11-19 08:04:47,238 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-19 08:04:47,251 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:04:47,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:47,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:47,263 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:04:47,359 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:04:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 114 transitions, 249 flow [2023-11-19 08:04:47,485 INFO L124 PetriNetUnfolderBase]: 7/111 cut-off events. [2023-11-19 08:04:47,485 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:47,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 111 events. 7/111 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-19 08:04:47,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 114 transitions, 249 flow [2023-11-19 08:04:47,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 100 transitions, 218 flow [2023-11-19 08:04:47,501 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:04:47,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 100 transitions, 218 flow [2023-11-19 08:04:47,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 100 transitions, 218 flow [2023-11-19 08:04:47,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 100 transitions, 218 flow [2023-11-19 08:04:47,565 INFO L124 PetriNetUnfolderBase]: 7/100 cut-off events. [2023-11-19 08:04:47,570 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:47,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 7/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-19 08:04:47,574 INFO L119 LiptonReduction]: Number of co-enabled transitions 1572 [2023-11-19 08:04:51,837 INFO L134 LiptonReduction]: Checked pairs total: 2244 [2023-11-19 08:04:51,837 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-19 08:04:51,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:51,877 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;@57ebc099, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:51,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:04:51,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:51,902 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-19 08:04:51,902 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:04:51,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:51,903 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 08:04:51,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash 692410098, now seen corresponding path program 1 times [2023-11-19 08:04:51,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:51,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321280456] [2023-11-19 08:04:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:52,734 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 08:04:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321280456] [2023-11-19 08:04:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321280456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:52,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:52,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:04:52,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075076595] [2023-11-19 08:04:52,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:52,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:52,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:52,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 199 [2023-11-19 08:04:52,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 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 08:04:52,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:52,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 199 [2023-11-19 08:04:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:53,247 INFO L124 PetriNetUnfolderBase]: 401/662 cut-off events. [2023-11-19 08:04:53,247 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-19 08:04:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 662 events. 401/662 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2589 event pairs, 68 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 1112. Up to 321 conditions per place. [2023-11-19 08:04:53,256 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 53 selfloop transitions, 5 changer transitions 21/80 dead transitions. [2023-11-19 08:04:53,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 80 transitions, 372 flow [2023-11-19 08:04:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:04:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:04:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 725 transitions. [2023-11-19 08:04:53,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204594400574301 [2023-11-19 08:04:53,276 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 725 transitions. [2023-11-19 08:04:53,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 725 transitions. [2023-11-19 08:04:53,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:53,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 725 transitions. [2023-11-19 08:04:53,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.57142857142857) internal successors, (725), 7 states have internal predecessors, (725), 0 states have call successors, (0), 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 08:04:53,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 08:04:53,304 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 08:04:53,306 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 725 transitions. [2023-11-19 08:04:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 80 transitions, 372 flow [2023-11-19 08:04:53,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 80 transitions, 336 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 08:04:53,316 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-11-19 08:04:53,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-19 08:04:53,323 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-19 08:04:53,324 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-11-19 08:04:53,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 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 08:04:53,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:53,325 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 08:04:53,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:53,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:53,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -936709206, now seen corresponding path program 2 times [2023-11-19 08:04:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430026112] [2023-11-19 08:04:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:53,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:53,544 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 08:04:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430026112] [2023-11-19 08:04:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430026112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848710843] [2023-11-19 08:04:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:53,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 199 [2023-11-19 08:04:53,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 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 08:04:53,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:53,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 199 [2023-11-19 08:04:53,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:53,745 INFO L124 PetriNetUnfolderBase]: 256/435 cut-off events. [2023-11-19 08:04:53,745 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2023-11-19 08:04:53,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 435 events. 256/435 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1586 event pairs, 18 based on Foata normal form. 32/465 useless extension candidates. Maximal degree in co-relation 909. Up to 236 conditions per place. [2023-11-19 08:04:53,752 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-19 08:04:53,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 266 flow [2023-11-19 08:04:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-11-19 08:04:53,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201005025125628 [2023-11-19 08:04:53,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-11-19 08:04:53,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-11-19 08:04:53,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:53,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-11-19 08:04:53,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 08:04:53,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 08:04:53,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 08:04:53,768 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 414 transitions. [2023-11-19 08:04:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 266 flow [2023-11-19 08:04:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 251 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:53,774 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-11-19 08:04:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-19 08:04:53,781 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-19 08:04:53,781 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-11-19 08:04:53,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 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 08:04:53,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:53,782 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 08:04:53,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:53,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:53,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1301182546, now seen corresponding path program 3 times [2023-11-19 08:04:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:53,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224632570] [2023-11-19 08:04:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:54,021 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 08:04:54,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:54,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224632570] [2023-11-19 08:04:54,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224632570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:54,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:54,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645636178] [2023-11-19 08:04:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 199 [2023-11-19 08:04:54,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 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 08:04:54,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:54,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 199 [2023-11-19 08:04:54,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:54,210 INFO L124 PetriNetUnfolderBase]: 199/352 cut-off events. [2023-11-19 08:04:54,210 INFO L125 PetriNetUnfolderBase]: For 489/489 co-relation queries the response was YES. [2023-11-19 08:04:54,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 352 events. 199/352 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1174 event pairs, 28 based on Foata normal form. 20/371 useless extension candidates. Maximal degree in co-relation 887. Up to 212 conditions per place. [2023-11-19 08:04:54,215 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 33 selfloop transitions, 7 changer transitions 2/43 dead transitions. [2023-11-19 08:04:54,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 283 flow [2023-11-19 08:04:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-11-19 08:04:54,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150753768844221 [2023-11-19 08:04:54,217 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-11-19 08:04:54,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-11-19 08:04:54,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:54,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-11-19 08:04:54,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 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 08:04:54,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 08:04:54,223 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 08:04:54,223 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 410 transitions. [2023-11-19 08:04:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 283 flow [2023-11-19 08:04:54,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:54,227 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-11-19 08:04:54,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-19 08:04:54,228 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-11-19 08:04:54,229 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-11-19 08:04:54,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 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 08:04:54,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:54,229 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 08:04:54,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:04:54,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:54,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -965783094, now seen corresponding path program 4 times [2023-11-19 08:04:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:54,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50967326] [2023-11-19 08:04:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:54,360 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 08:04:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50967326] [2023-11-19 08:04:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50967326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:54,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:54,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:04:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406583218] [2023-11-19 08:04:54,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:54,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 199 [2023-11-19 08:04:54,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 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 08:04:54,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:54,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 199 [2023-11-19 08:04:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:54,570 INFO L124 PetriNetUnfolderBase]: 215/370 cut-off events. [2023-11-19 08:04:54,570 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2023-11-19 08:04:54,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 370 events. 215/370 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1234 event pairs, 26 based on Foata normal form. 12/381 useless extension candidates. Maximal degree in co-relation 967. Up to 151 conditions per place. [2023-11-19 08:04:54,574 INFO L140 encePairwiseOnDemand]: 193/199 looper letters, 38 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2023-11-19 08:04:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 344 flow [2023-11-19 08:04:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-11-19 08:04:54,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085427135678392 [2023-11-19 08:04:54,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-11-19 08:04:54,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-11-19 08:04:54,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:54,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-11-19 08:04:54,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 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 08:04:54,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 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 08:04:54,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 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 08:04:54,585 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 506 transitions. [2023-11-19 08:04:54,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 344 flow [2023-11-19 08:04:54,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 330 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:54,589 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-11-19 08:04:54,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-19 08:04:54,590 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-19 08:04:54,591 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-11-19 08:04:54,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 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 08:04:54,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:54,592 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 08:04:54,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:04:54,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:54,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1414039710, now seen corresponding path program 5 times [2023-11-19 08:04:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496198276] [2023-11-19 08:04:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:54,746 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 08:04:54,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:54,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496198276] [2023-11-19 08:04:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496198276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:54,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:54,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:04:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654517303] [2023-11-19 08:04:54,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:54,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:04:54,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:04:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:54,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 199 [2023-11-19 08:04:54,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 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 08:04:54,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:54,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 199 [2023-11-19 08:04:54,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:54,960 INFO L124 PetriNetUnfolderBase]: 201/336 cut-off events. [2023-11-19 08:04:54,960 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2023-11-19 08:04:54,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 336 events. 201/336 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1085 event pairs, 23 based on Foata normal form. 10/346 useless extension candidates. Maximal degree in co-relation 981. Up to 222 conditions per place. [2023-11-19 08:04:54,965 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 33 selfloop transitions, 3 changer transitions 18/55 dead transitions. [2023-11-19 08:04:54,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 414 flow [2023-11-19 08:04:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:04:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:04:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 693 transitions. [2023-11-19 08:04:54,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49748743718592964 [2023-11-19 08:04:54,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 693 transitions. [2023-11-19 08:04:54,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 693 transitions. [2023-11-19 08:04:54,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:54,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 693 transitions. [2023-11-19 08:04:54,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 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 08:04:54,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 08:04:54,978 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 08:04:54,979 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 693 transitions. [2023-11-19 08:04:54,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 414 flow [2023-11-19 08:04:54,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:54,985 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-11-19 08:04:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-11-19 08:04:54,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-11-19 08:04:54,988 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-11-19 08:04:54,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 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 08:04:54,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:54,989 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 08:04:54,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:04:54,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:54,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:54,990 INFO L85 PathProgramCache]: Analyzing trace with hash 624777944, now seen corresponding path program 1 times [2023-11-19 08:04:54,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:54,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281801311] [2023-11-19 08:04:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:55,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281801311] [2023-11-19 08:04:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281801311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:55,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045822592] [2023-11-19 08:04:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:55,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:55,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:55,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:55,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:55,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:04:55,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:55,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:55,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045822592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:55,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:55,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:04:55,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912218946] [2023-11-19 08:04:55,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:55,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:04:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:04:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:55,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2023-11-19 08:04:55,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 12 states, 12 states have (on average 92.25) internal successors, (1107), 12 states have internal predecessors, (1107), 0 states have call successors, (0), 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 08:04:55,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:55,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2023-11-19 08:04:55,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:56,660 INFO L124 PetriNetUnfolderBase]: 431/722 cut-off events. [2023-11-19 08:04:56,660 INFO L125 PetriNetUnfolderBase]: For 1855/1855 co-relation queries the response was YES. [2023-11-19 08:04:56,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 722 events. 431/722 cut-off events. For 1855/1855 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2951 event pairs, 15 based on Foata normal form. 22/744 useless extension candidates. Maximal degree in co-relation 2656. Up to 265 conditions per place. [2023-11-19 08:04:56,671 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 104 selfloop transitions, 44 changer transitions 6/155 dead transitions. [2023-11-19 08:04:56,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 155 transitions, 1167 flow [2023-11-19 08:04:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:04:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 08:04:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2023 transitions. [2023-11-19 08:04:56,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48408710217755446 [2023-11-19 08:04:56,679 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2023 transitions. [2023-11-19 08:04:56,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2023 transitions. [2023-11-19 08:04:56,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:56,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2023 transitions. [2023-11-19 08:04:56,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.33333333333333) internal successors, (2023), 21 states have internal predecessors, (2023), 0 states have call successors, (0), 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 08:04:56,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 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 08:04:56,698 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 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 08:04:56,698 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 21 states and 2023 transitions. [2023-11-19 08:04:56,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 155 transitions, 1167 flow [2023-11-19 08:04:56,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 155 transitions, 1127 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-11-19 08:04:56,708 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 663 flow [2023-11-19 08:04:56,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=663, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2023-11-19 08:04:56,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2023-11-19 08:04:56,709 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 663 flow [2023-11-19 08:04:56,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.25) internal successors, (1107), 12 states have internal predecessors, (1107), 0 states have call successors, (0), 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 08:04:56,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:56,710 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 08:04:56,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:56,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:56,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:56,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1009921516, now seen corresponding path program 1 times [2023-11-19 08:04:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142558854] [2023-11-19 08:04:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142558854] [2023-11-19 08:04:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142558854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297032882] [2023-11-19 08:04:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:57,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:57,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:57,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:04:57,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:57,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:57,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297032882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:57,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:57,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 08:04:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324383669] [2023-11-19 08:04:57,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:04:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:04:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:04:57,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2023-11-19 08:04:57,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 663 flow. Second operand has 11 states, 11 states have (on average 92.27272727272727) internal successors, (1015), 11 states have internal predecessors, (1015), 0 states have call successors, (0), 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 08:04:57,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:57,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2023-11-19 08:04:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:58,469 INFO L124 PetriNetUnfolderBase]: 707/1186 cut-off events. [2023-11-19 08:04:58,469 INFO L125 PetriNetUnfolderBase]: For 5312/5358 co-relation queries the response was YES. [2023-11-19 08:04:58,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 1186 events. 707/1186 cut-off events. For 5312/5358 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5562 event pairs, 23 based on Foata normal form. 128/1294 useless extension candidates. Maximal degree in co-relation 4402. Up to 525 conditions per place. [2023-11-19 08:04:58,479 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 68 selfloop transitions, 25 changer transitions 134/229 dead transitions. [2023-11-19 08:04:58,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 229 transitions, 2258 flow [2023-11-19 08:04:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:04:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 08:04:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2022 transitions. [2023-11-19 08:04:58,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838478104809763 [2023-11-19 08:04:58,487 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2022 transitions. [2023-11-19 08:04:58,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2022 transitions. [2023-11-19 08:04:58,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:58,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2022 transitions. [2023-11-19 08:04:58,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.28571428571429) internal successors, (2022), 21 states have internal predecessors, (2022), 0 states have call successors, (0), 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 08:04:58,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 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 08:04:58,506 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 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 08:04:58,506 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 663 flow. Second operand 21 states and 2022 transitions. [2023-11-19 08:04:58,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 229 transitions, 2258 flow [2023-11-19 08:04:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 229 transitions, 1804 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-11-19 08:04:58,533 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 423 flow [2023-11-19 08:04:58,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=423, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-11-19 08:04:58,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2023-11-19 08:04:58,534 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 423 flow [2023-11-19 08:04:58,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 92.27272727272727) internal successors, (1015), 11 states have internal predecessors, (1015), 0 states have call successors, (0), 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 08:04:58,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:58,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:58,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:58,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:04:58,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1707977796, now seen corresponding path program 2 times [2023-11-19 08:04:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636547306] [2023-11-19 08:04:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636547306] [2023-11-19 08:04:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636547306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158551536] [2023-11-19 08:04:59,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:59,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:59,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:59,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:59,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:04:59,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:59,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:00,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158551536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:00,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:00,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 08:05:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329446124] [2023-11-19 08:05:00,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:00,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:05:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:05:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:05:00,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2023-11-19 08:05:00,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 91.66666666666667) internal successors, (1650), 18 states have internal predecessors, (1650), 0 states have call successors, (0), 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 08:05:00,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:00,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2023-11-19 08:05:00,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:01,993 INFO L124 PetriNetUnfolderBase]: 968/1641 cut-off events. [2023-11-19 08:05:01,993 INFO L125 PetriNetUnfolderBase]: For 11848/11908 co-relation queries the response was YES. [2023-11-19 08:05:02,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8749 conditions, 1641 events. 968/1641 cut-off events. For 11848/11908 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7881 event pairs, 15 based on Foata normal form. 114/1745 useless extension candidates. Maximal degree in co-relation 7712. Up to 667 conditions per place. [2023-11-19 08:05:02,012 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 149 selfloop transitions, 65 changer transitions 111/327 dead transitions. [2023-11-19 08:05:02,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 327 transitions, 3344 flow [2023-11-19 08:05:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 08:05:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 08:05:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3755 transitions. [2023-11-19 08:05:02,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838294034273934 [2023-11-19 08:05:02,078 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3755 transitions. [2023-11-19 08:05:02,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3755 transitions. [2023-11-19 08:05:02,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:02,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3755 transitions. [2023-11-19 08:05:02,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 96.28205128205128) internal successors, (3755), 39 states have internal predecessors, (3755), 0 states have call successors, (0), 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 08:05:02,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 199.0) internal successors, (7960), 40 states have internal predecessors, (7960), 0 states have call successors, (0), 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 08:05:02,115 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 199.0) internal successors, (7960), 40 states have internal predecessors, (7960), 0 states have call successors, (0), 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 08:05:02,115 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 423 flow. Second operand 39 states and 3755 transitions. [2023-11-19 08:05:02,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 327 transitions, 3344 flow [2023-11-19 08:05:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 327 transitions, 2782 flow, removed 223 selfloop flow, removed 16 redundant places. [2023-11-19 08:05:02,168 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 909 flow [2023-11-19 08:05:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=909, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2023-11-19 08:05:02,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-11-19 08:05:02,173 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 909 flow [2023-11-19 08:05:02,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.66666666666667) internal successors, (1650), 18 states have internal predecessors, (1650), 0 states have call successors, (0), 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 08:05:02,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:02,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:02,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:02,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:02,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash -728015844, now seen corresponding path program 1 times [2023-11-19 08:05:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519729418] [2023-11-19 08:05:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:02,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:02,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519729418] [2023-11-19 08:05:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519729418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242705217] [2023-11-19 08:05:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:02,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:02,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:02,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:05:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:02,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:02,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:03,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242705217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:03,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 08:05:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656104158] [2023-11-19 08:05:03,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:05:03,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:05:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:05:03,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2023-11-19 08:05:03,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 909 flow. Second operand has 18 states, 18 states have (on average 89.44444444444444) internal successors, (1610), 18 states have internal predecessors, (1610), 0 states have call successors, (0), 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 08:05:03,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:03,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2023-11-19 08:05:03,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:05,811 INFO L124 PetriNetUnfolderBase]: 1114/1977 cut-off events. [2023-11-19 08:05:05,811 INFO L125 PetriNetUnfolderBase]: For 12866/12898 co-relation queries the response was YES. [2023-11-19 08:05:05,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 1977 events. 1114/1977 cut-off events. For 12866/12898 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10635 event pairs, 5 based on Foata normal form. 98/2063 useless extension candidates. Maximal degree in co-relation 9218. Up to 715 conditions per place. [2023-11-19 08:05:05,835 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 155 selfloop transitions, 94 changer transitions 126/379 dead transitions. [2023-11-19 08:05:05,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 379 transitions, 3825 flow [2023-11-19 08:05:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 08:05:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-19 08:05:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3670 transitions. [2023-11-19 08:05:05,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47287720654554827 [2023-11-19 08:05:05,847 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3670 transitions. [2023-11-19 08:05:05,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3670 transitions. [2023-11-19 08:05:05,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:05,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3670 transitions. [2023-11-19 08:05:05,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 94.1025641025641) internal successors, (3670), 39 states have internal predecessors, (3670), 0 states have call successors, (0), 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 08:05:05,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 199.0) internal successors, (7960), 40 states have internal predecessors, (7960), 0 states have call successors, (0), 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 08:05:05,879 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 199.0) internal successors, (7960), 40 states have internal predecessors, (7960), 0 states have call successors, (0), 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 08:05:05,879 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 909 flow. Second operand 39 states and 3670 transitions. [2023-11-19 08:05:05,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 379 transitions, 3825 flow [2023-11-19 08:05:05,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 379 transitions, 2993 flow, removed 365 selfloop flow, removed 14 redundant places. [2023-11-19 08:05:05,966 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1376 flow [2023-11-19 08:05:05,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2023-11-19 08:05:05,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2023-11-19 08:05:05,968 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1376 flow [2023-11-19 08:05:05,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.44444444444444) internal successors, (1610), 18 states have internal predecessors, (1610), 0 states have call successors, (0), 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 08:05:05,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:05,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:06,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:06,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:06,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:06,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -808823832, now seen corresponding path program 2 times [2023-11-19 08:05:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:06,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315049353] [2023-11-19 08:05:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315049353] [2023-11-19 08:05:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315049353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398427858] [2023-11-19 08:05:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:05:06,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:06,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:06,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:06,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:05:06,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:05:06,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:06,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:06,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:06,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:07,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398427858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:07,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:07,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 08:05:07,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848153885] [2023-11-19 08:05:07,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:07,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:05:07,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:05:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:05:07,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2023-11-19 08:05:07,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1376 flow. Second operand has 18 states, 18 states have (on average 87.05555555555556) internal successors, (1567), 18 states have internal predecessors, (1567), 0 states have call successors, (0), 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 08:05:07,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:07,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2023-11-19 08:05:07,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:10,462 INFO L124 PetriNetUnfolderBase]: 1787/2888 cut-off events. [2023-11-19 08:05:10,462 INFO L125 PetriNetUnfolderBase]: For 16127/16127 co-relation queries the response was YES. [2023-11-19 08:05:10,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14085 conditions, 2888 events. 1787/2888 cut-off events. For 16127/16127 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14130 event pairs, 61 based on Foata normal form. 144/3032 useless extension candidates. Maximal degree in co-relation 13479. Up to 707 conditions per place. [2023-11-19 08:05:10,493 INFO L140 encePairwiseOnDemand]: 190/199 looper letters, 192 selfloop transitions, 93 changer transitions 187/472 dead transitions. [2023-11-19 08:05:10,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 472 transitions, 4945 flow [2023-11-19 08:05:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-19 08:05:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-19 08:05:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4631 transitions. [2023-11-19 08:05:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563011134101882 [2023-11-19 08:05:10,509 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4631 transitions. [2023-11-19 08:05:10,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4631 transitions. [2023-11-19 08:05:10,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:10,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4631 transitions. [2023-11-19 08:05:10,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 90.80392156862744) internal successors, (4631), 51 states have internal predecessors, (4631), 0 states have call successors, (0), 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 08:05:10,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 199.0) internal successors, (10348), 52 states have internal predecessors, (10348), 0 states have call successors, (0), 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 08:05:10,546 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 199.0) internal successors, (10348), 52 states have internal predecessors, (10348), 0 states have call successors, (0), 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 08:05:10,547 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1376 flow. Second operand 51 states and 4631 transitions. [2023-11-19 08:05:10,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 472 transitions, 4945 flow [2023-11-19 08:05:10,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 472 transitions, 4292 flow, removed 209 selfloop flow, removed 22 redundant places. [2023-11-19 08:05:10,679 INFO L231 Difference]: Finished difference. Result has 164 places, 165 transitions, 1776 flow [2023-11-19 08:05:10,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1776, PETRI_PLACES=164, PETRI_TRANSITIONS=165} [2023-11-19 08:05:10,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2023-11-19 08:05:10,680 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 165 transitions, 1776 flow [2023-11-19 08:05:10,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.05555555555556) internal successors, (1567), 18 states have internal predecessors, (1567), 0 states have call successors, (0), 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 08:05:10,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:10,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:10,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:10,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:10,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -407428624, now seen corresponding path program 2 times [2023-11-19 08:05:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654368257] [2023-11-19 08:05:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:11,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654368257] [2023-11-19 08:05:11,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654368257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100633611] [2023-11-19 08:05:11,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:05:11,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:11,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:11,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:11,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:05:11,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:05:11,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:11,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:11,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:11,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100633611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:12,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:12,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 08:05:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002643082] [2023-11-19 08:05:12,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:12,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:05:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:05:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:05:12,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 199 [2023-11-19 08:05:12,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 165 transitions, 1776 flow. Second operand has 18 states, 18 states have (on average 89.11111111111111) internal successors, (1604), 18 states have internal predecessors, (1604), 0 states have call successors, (0), 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 08:05:12,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:12,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 199 [2023-11-19 08:05:12,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:15,131 INFO L124 PetriNetUnfolderBase]: 2073/3352 cut-off events. [2023-11-19 08:05:15,131 INFO L125 PetriNetUnfolderBase]: For 53540/53540 co-relation queries the response was YES. [2023-11-19 08:05:15,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19698 conditions, 3352 events. 2073/3352 cut-off events. For 53540/53540 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16882 event pairs, 59 based on Foata normal form. 106/3458 useless extension candidates. Maximal degree in co-relation 18513. Up to 1098 conditions per place. [2023-11-19 08:05:15,176 INFO L140 encePairwiseOnDemand]: 189/199 looper letters, 216 selfloop transitions, 93 changer transitions 170/479 dead transitions. [2023-11-19 08:05:15,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 479 transitions, 6205 flow [2023-11-19 08:05:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 08:05:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 08:05:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4550 transitions. [2023-11-19 08:05:15,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46661880832735103 [2023-11-19 08:05:15,188 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4550 transitions. [2023-11-19 08:05:15,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4550 transitions. [2023-11-19 08:05:15,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:15,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4550 transitions. [2023-11-19 08:05:15,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 92.85714285714286) internal successors, (4550), 49 states have internal predecessors, (4550), 0 states have call successors, (0), 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 08:05:15,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 199.0) internal successors, (9950), 50 states have internal predecessors, (9950), 0 states have call successors, (0), 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 08:05:15,220 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 199.0) internal successors, (9950), 50 states have internal predecessors, (9950), 0 states have call successors, (0), 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 08:05:15,221 INFO L175 Difference]: Start difference. First operand has 164 places, 165 transitions, 1776 flow. Second operand 49 states and 4550 transitions. [2023-11-19 08:05:15,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 479 transitions, 6205 flow [2023-11-19 08:05:15,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 479 transitions, 5188 flow, removed 491 selfloop flow, removed 28 redundant places. [2023-11-19 08:05:15,517 INFO L231 Difference]: Finished difference. Result has 185 places, 202 transitions, 2321 flow [2023-11-19 08:05:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2321, PETRI_PLACES=185, PETRI_TRANSITIONS=202} [2023-11-19 08:05:15,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2023-11-19 08:05:15,519 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 202 transitions, 2321 flow [2023-11-19 08:05:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.11111111111111) internal successors, (1604), 18 states have internal predecessors, (1604), 0 states have call successors, (0), 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 08:05:15,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:15,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:15,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:15,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:15,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:15,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -57413150, now seen corresponding path program 3 times [2023-11-19 08:05:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:15,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733821383] [2023-11-19 08:05:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:16,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733821383] [2023-11-19 08:05:16,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733821383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273234718] [2023-11-19 08:05:16,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:05:16,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:16,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:05:16,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 08:05:16,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:16,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:05:16,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:16,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:17,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273234718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:17,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:17,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-19 08:05:17,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837828155] [2023-11-19 08:05:17,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:17,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:05:17,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:05:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:05:17,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2023-11-19 08:05:17,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 202 transitions, 2321 flow. Second operand has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 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 08:05:17,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:17,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2023-11-19 08:05:17,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:21,421 INFO L124 PetriNetUnfolderBase]: 1989/3514 cut-off events. [2023-11-19 08:05:21,421 INFO L125 PetriNetUnfolderBase]: For 113324/113642 co-relation queries the response was YES. [2023-11-19 08:05:21,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26876 conditions, 3514 events. 1989/3514 cut-off events. For 113324/113642 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21124 event pairs, 47 based on Foata normal form. 216/3702 useless extension candidates. Maximal degree in co-relation 25291. Up to 867 conditions per place. [2023-11-19 08:05:21,475 INFO L140 encePairwiseOnDemand]: 192/199 looper letters, 258 selfloop transitions, 144 changer transitions 146/556 dead transitions. [2023-11-19 08:05:21,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 556 transitions, 8626 flow [2023-11-19 08:05:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 08:05:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-19 08:05:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4866 transitions. [2023-11-19 08:05:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702357943563974 [2023-11-19 08:05:21,489 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4866 transitions. [2023-11-19 08:05:21,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4866 transitions. [2023-11-19 08:05:21,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:21,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4866 transitions. [2023-11-19 08:05:21,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 93.57692307692308) internal successors, (4866), 52 states have internal predecessors, (4866), 0 states have call successors, (0), 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 08:05:21,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 199.0) internal successors, (10547), 53 states have internal predecessors, (10547), 0 states have call successors, (0), 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 08:05:21,541 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 199.0) internal successors, (10547), 53 states have internal predecessors, (10547), 0 states have call successors, (0), 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 08:05:21,542 INFO L175 Difference]: Start difference. First operand has 185 places, 202 transitions, 2321 flow. Second operand 52 states and 4866 transitions. [2023-11-19 08:05:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 556 transitions, 8626 flow [2023-11-19 08:05:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 556 transitions, 6801 flow, removed 895 selfloop flow, removed 30 redundant places. [2023-11-19 08:05:21,918 INFO L231 Difference]: Finished difference. Result has 190 places, 267 transitions, 3328 flow [2023-11-19 08:05:21,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3328, PETRI_PLACES=190, PETRI_TRANSITIONS=267} [2023-11-19 08:05:21,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2023-11-19 08:05:21,919 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 267 transitions, 3328 flow [2023-11-19 08:05:21,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 89.5) internal successors, (1790), 20 states have internal predecessors, (1790), 0 states have call successors, (0), 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 08:05:21,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:21,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:21,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:22,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 08:05:22,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1485988104, now seen corresponding path program 4 times [2023-11-19 08:05:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:22,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026477221] [2023-11-19 08:05:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:22,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:22,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026477221] [2023-11-19 08:05:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026477221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118359417] [2023-11-19 08:05:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:05:22,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:22,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3586ed1-8897-4f2e-a29b-3e1ca079ca10/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:05:22,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:05:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:05:22,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:22,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:23,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118359417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:24,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:24,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 08:05:24,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841501648] [2023-11-19 08:05:24,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:24,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 08:05:24,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:05:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:05:25,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2023-11-19 08:05:25,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 267 transitions, 3328 flow. Second operand has 24 states, 24 states have (on average 89.20833333333333) internal successors, (2141), 24 states have internal predecessors, (2141), 0 states have call successors, (0), 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 08:05:25,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:25,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2023-11-19 08:05:25,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand