./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl --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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:44,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:44,354 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:27:44,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:44,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:44,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:44,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:44,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:44,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:44,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:44,419 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:44,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:44,420 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:44,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:44,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:27:44,423 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:44,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:44,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:44,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:44,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:27:44,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:44,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:27:44,426 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:44,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:27:44,427 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:44,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:44,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:44,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:44,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:44,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:44,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:44,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:27:44,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:44,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:44,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:44,433 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:27:44,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:44,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:44,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:44,434 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_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2023-11-12 02:27:44,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:44,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:44,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:44,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:44,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:44,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-12 02:27:47,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:48,230 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:48,231 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-12 02:27:48,257 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/data/1a3919dd3/e13961af0eed4191bb7b6095c089d3d4/FLAG82393791e [2023-11-12 02:27:48,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/data/1a3919dd3/e13961af0eed4191bb7b6095c089d3d4 [2023-11-12 02:27:48,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:48,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:48,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:48,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:48,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:48,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:48" (1/1) ... [2023-11-12 02:27:48,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1f9cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:48, skipping insertion in model container [2023-11-12 02:27:48,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:48" (1/1) ... [2023-11-12 02:27:48,354 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:48,862 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_cd59b053-4026-4bd9-bf66-3e67e30fd20f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-11-12 02:27:48,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:48,925 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:48,998 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_cd59b053-4026-4bd9-bf66-3e67e30fd20f/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-11-12 02:27:49,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:49,122 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:49,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49 WrapperNode [2023-11-12 02:27:49,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:49,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:49,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:49,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:49,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,217 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 197 [2023-11-12 02:27:49,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:49,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:49,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:49,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:49,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:49,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:49,283 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:49,283 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:49,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (1/1) ... [2023-11-12 02:27:49,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:49,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:27:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:27:49,380 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:27:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:49,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:49,383 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:27:49,619 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:49,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:49,898 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:49,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:49,909 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-11-12 02:27:49,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:49 BoogieIcfgContainer [2023-11-12 02:27:49,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:49,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:49,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:49,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:49,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:48" (1/3) ... [2023-11-12 02:27:49,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb76459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:49, skipping insertion in model container [2023-11-12 02:27:49,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:49" (2/3) ... [2023-11-12 02:27:49,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb76459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:49, skipping insertion in model container [2023-11-12 02:27:49,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:49" (3/3) ... [2023-11-12 02:27:49,930 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-11-12 02:27:49,947 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:27:49,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:49,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:27:49,957 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:27:50,062 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:27:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 201 transitions, 409 flow [2023-11-12 02:27:50,219 INFO L124 PetriNetUnfolderBase]: 49/288 cut-off events. [2023-11-12 02:27:50,220 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:27:50,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 288 events. 49/288 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1054 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-11-12 02:27:50,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 201 transitions, 409 flow [2023-11-12 02:27:50,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 196 transitions, 396 flow [2023-11-12 02:27:50,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:50,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 196 transitions, 396 flow [2023-11-12 02:27:50,262 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 196 transitions, 396 flow [2023-11-12 02:27:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 196 transitions, 396 flow [2023-11-12 02:27:50,375 INFO L124 PetriNetUnfolderBase]: 48/283 cut-off events. [2023-11-12 02:27:50,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:50,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 283 events. 48/283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1007 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-11-12 02:27:50,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 13392 [2023-11-12 02:27:53,632 INFO L134 LiptonReduction]: Checked pairs total: 18297 [2023-11-12 02:27:53,633 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-11-12 02:27:53,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:53,656 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;@618ad4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:53,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:27:53,664 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:53,664 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-12 02:27:53,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:53,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:53,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:27:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1485233052, now seen corresponding path program 1 times [2023-11-12 02:27:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:53,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944277843] [2023-11-12 02:27:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:53,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944277843] [2023-11-12 02:27:54,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944277843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:54,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:54,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:54,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951721558] [2023-11-12 02:27:54,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:54,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:54,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 361 [2023-11-12 02:27:54,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:54,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 361 [2023-11-12 02:27:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:54,323 INFO L124 PetriNetUnfolderBase]: 380/772 cut-off events. [2023-11-12 02:27:54,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3526 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-11-12 02:27:54,330 INFO L140 encePairwiseOnDemand]: 336/361 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-12 02:27:54,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 184 flow [2023-11-12 02:27:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-11-12 02:27:54,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143120960295475 [2023-11-12 02:27:54,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-11-12 02:27:54,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-11-12 02:27:54,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:54,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-11-12 02:27:54,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,383 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 142 flow. Second operand 3 states and 557 transitions. [2023-11-12 02:27:54,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 184 flow [2023-11-12 02:27:54,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:54,388 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 110 flow [2023-11-12 02:27:54,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-12 02:27:54,394 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-12 02:27:54,394 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 110 flow [2023-11-12 02:27:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:54,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:54,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:54,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:27:54,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 480875499, now seen corresponding path program 1 times [2023-11-12 02:27:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:54,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380052154] [2023-11-12 02:27:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380052154] [2023-11-12 02:27:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380052154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747759634] [2023-11-12 02:27:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:54,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:54,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:54,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:27:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:54,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:54,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:54,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747759634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:54,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:54,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:27:54,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307040175] [2023-11-12 02:27:54,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:54,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:54,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:54,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 361 [2023-11-12 02:27:54,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:54,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 361 [2023-11-12 02:27:54,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:54,851 INFO L124 PetriNetUnfolderBase]: 380/762 cut-off events. [2023-11-12 02:27:54,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:54,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 762 events. 380/762 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3505 event pairs, 136 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1452. Up to 670 conditions per place. [2023-11-12 02:27:54,857 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 59 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-12 02:27:54,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 270 flow [2023-11-12 02:27:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-11-12 02:27:54,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106186518928901 [2023-11-12 02:27:54,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-11-12 02:27:54,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-11-12 02:27:54,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:54,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-11-12 02:27:54,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,892 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 110 flow. Second operand 3 states and 553 transitions. [2023-11-12 02:27:54,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 270 flow [2023-11-12 02:27:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 266 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:54,895 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 114 flow [2023-11-12 02:27:54,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-12 02:27:54,900 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-11-12 02:27:54,900 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 114 flow [2023-11-12 02:27:54,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:54,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:54,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:27:55,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:27:55,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 471269411, now seen corresponding path program 1 times [2023-11-12 02:27:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97014430] [2023-11-12 02:27:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97014430] [2023-11-12 02:27:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97014430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537844296] [2023-11-12 02:27:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:55,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:55,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:55,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:27:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:55,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:55,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:55,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537844296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:55,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:55,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:27:55,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543477377] [2023-11-12 02:27:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:55,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:55,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 361 [2023-11-12 02:27:55,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 164.57142857142858) internal successors, (1152), 7 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:55,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:55,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 361 [2023-11-12 02:27:55,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:55,574 INFO L124 PetriNetUnfolderBase]: 380/758 cut-off events. [2023-11-12 02:27:55,574 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-12 02:27:55,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 758 events. 380/758 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3351 event pairs, 306 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 1493. Up to 690 conditions per place. [2023-11-12 02:27:55,580 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 40 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-12 02:27:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 216 flow [2023-11-12 02:27:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:27:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:27:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1026 transitions. [2023-11-12 02:27:55,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-11-12 02:27:55,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1026 transitions. [2023-11-12 02:27:55,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1026 transitions. [2023-11-12 02:27:55,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:55,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1026 transitions. [2023-11-12 02:27:55,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:55,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:55,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:55,597 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 114 flow. Second operand 6 states and 1026 transitions. [2023-11-12 02:27:55,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 216 flow [2023-11-12 02:27:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:55,600 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 146 flow [2023-11-12 02:27:55,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-12 02:27:55,601 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-11-12 02:27:55,602 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 146 flow [2023-11-12 02:27:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.57142857142858) internal successors, (1152), 7 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:55,603 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:27:55,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:55,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:55,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:27:55,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1488340388, now seen corresponding path program 2 times [2023-11-12 02:27:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782846440] [2023-11-12 02:27:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782846440] [2023-11-12 02:27:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782846440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164988868] [2023-11-12 02:27:55,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:27:55,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:55,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:56,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:27:56,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:27:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:56,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:27:56,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:56,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:27:56,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164988868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:56,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:56,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:27:56,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874097636] [2023-11-12 02:27:56,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:56,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:27:56,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:27:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:27:56,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 361 [2023-11-12 02:27:56,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 164.30769230769232) internal successors, (2136), 13 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:56,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:56,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 361 [2023-11-12 02:27:56,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:56,440 INFO L124 PetriNetUnfolderBase]: 380/765 cut-off events. [2023-11-12 02:27:56,441 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-12 02:27:56,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 765 events. 380/765 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3348 event pairs, 306 based on Foata normal form. 6/655 useless extension candidates. Maximal degree in co-relation 1482. Up to 690 conditions per place. [2023-11-12 02:27:56,447 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 40 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2023-11-12 02:27:56,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 284 flow [2023-11-12 02:27:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:27:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:27:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2013 transitions. [2023-11-12 02:27:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646814404432133 [2023-11-12 02:27:56,455 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2013 transitions. [2023-11-12 02:27:56,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2013 transitions. [2023-11-12 02:27:56,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:56,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2013 transitions. [2023-11-12 02:27:56,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.75) internal successors, (2013), 12 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:56,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:56,476 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:56,476 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 146 flow. Second operand 12 states and 2013 transitions. [2023-11-12 02:27:56,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 284 flow [2023-11-12 02:27:56,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 270 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:56,481 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 216 flow [2023-11-12 02:27:56,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-11-12 02:27:56,482 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2023-11-12 02:27:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 216 flow [2023-11-12 02:27:56,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 164.30769230769232) internal successors, (2136), 13 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:56,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:56,484 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-12 02:27:56,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:56,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:56,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:27:56,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash 931206396, now seen corresponding path program 3 times [2023-11-12 02:27:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:56,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617463426] [2023-11-12 02:27:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:56,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:56,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:56,797 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:56,798 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 02:27:56,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 02:27:56,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 02:27:56,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 02:27:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:27:56,802 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-12 02:27:56,806 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:56,806 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:27:56,870 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:27:56,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:56,954 INFO L124 PetriNetUnfolderBase]: 82/475 cut-off events. [2023-11-12 02:27:56,954 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:27:56,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 475 events. 82/475 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2161 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 290. Up to 12 conditions per place. [2023-11-12 02:27:56,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:56,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:56,965 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:56,965 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:56,965 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 275 transitions, 566 flow [2023-11-12 02:27:57,039 INFO L124 PetriNetUnfolderBase]: 82/475 cut-off events. [2023-11-12 02:27:57,040 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:27:57,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 475 events. 82/475 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2161 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 290. Up to 12 conditions per place. [2023-11-12 02:27:57,078 INFO L119 LiptonReduction]: Number of co-enabled transitions 38736 [2023-11-12 02:28:00,764 INFO L134 LiptonReduction]: Checked pairs total: 61407 [2023-11-12 02:28:00,764 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-11-12 02:28:00,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:00,768 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;@618ad4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:00,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:28:00,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:00,772 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2023-11-12 02:28:00,773 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:28:00,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:00,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:00,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash 434396380, now seen corresponding path program 1 times [2023-11-12 02:28:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009204033] [2023-11-12 02:28:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:00,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:00,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009204033] [2023-11-12 02:28:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009204033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:00,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:00,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:00,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486150053] [2023-11-12 02:28:00,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:00,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:00,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 495 [2023-11-12 02:28:00,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 108 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:00,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:00,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 495 [2023-11-12 02:28:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:03,107 INFO L124 PetriNetUnfolderBase]: 12095/18653 cut-off events. [2023-11-12 02:28:03,107 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-12 02:28:03,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35929 conditions, 18653 events. 12095/18653 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 119713 event pairs, 10328 based on Foata normal form. 3245/18245 useless extension candidates. Maximal degree in co-relation 12233. Up to 17187 conditions per place. [2023-11-12 02:28:03,263 INFO L140 encePairwiseOnDemand]: 459/495 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-12 02:28:03,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 292 flow [2023-11-12 02:28:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-11-12 02:28:03,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-12 02:28:03,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-11-12 02:28:03,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-11-12 02:28:03,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:03,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-11-12 02:28:03,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:03,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:03,278 INFO L175 Difference]: Start difference. First operand has 71 places, 108 transitions, 232 flow. Second operand 3 states and 765 transitions. [2023-11-12 02:28:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 292 flow [2023-11-12 02:28:03,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:03,284 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 178 flow [2023-11-12 02:28:03,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-11-12 02:28:03,289 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-12 02:28:03,290 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 178 flow [2023-11-12 02:28:03,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:03,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:03,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:28:03,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:03,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash 4581699, now seen corresponding path program 1 times [2023-11-12 02:28:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:03,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760801039] [2023-11-12 02:28:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:03,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760801039] [2023-11-12 02:28:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760801039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601205775] [2023-11-12 02:28:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:03,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:03,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:28:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:03,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:28:03,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:03,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601205775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:03,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:28:03,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:28:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049020684] [2023-11-12 02:28:03,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:28:03,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 495 [2023-11-12 02:28:03,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:03,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:03,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 495 [2023-11-12 02:28:03,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:05,547 INFO L124 PetriNetUnfolderBase]: 11884/18501 cut-off events. [2023-11-12 02:28:05,547 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-12 02:28:05,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35768 conditions, 18501 events. 11884/18501 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 121745 event pairs, 4928 based on Foata normal form. 0/14872 useless extension candidates. Maximal degree in co-relation 35755. Up to 17153 conditions per place. [2023-11-12 02:28:05,653 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-12 02:28:05,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 374 flow [2023-11-12 02:28:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-11-12 02:28:05,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043771043771044 [2023-11-12 02:28:05,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-11-12 02:28:05,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-11-12 02:28:05,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:05,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-11-12 02:28:05,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,665 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 178 flow. Second operand 3 states and 749 transitions. [2023-11-12 02:28:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 374 flow [2023-11-12 02:28:05,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:05,672 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 186 flow [2023-11-12 02:28:05,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-11-12 02:28:05,674 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-11-12 02:28:05,674 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 186 flow [2023-11-12 02:28:05,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:05,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:05,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:05,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:05,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:05,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2068656685, now seen corresponding path program 1 times [2023-11-12 02:28:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:05,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067643737] [2023-11-12 02:28:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067643737] [2023-11-12 02:28:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067643737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513189793] [2023-11-12 02:28:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:05,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:05,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:05,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:28:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:06,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:28:06,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:06,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513189793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:06,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:06,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:28:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667938241] [2023-11-12 02:28:06,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:06,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:28:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:28:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:28:06,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 495 [2023-11-12 02:28:06,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:06,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:06,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 495 [2023-11-12 02:28:06,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:07,933 INFO L124 PetriNetUnfolderBase]: 12152/18699 cut-off events. [2023-11-12 02:28:07,933 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2023-11-12 02:28:07,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36564 conditions, 18699 events. 12152/18699 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 119313 event pairs, 10328 based on Foata normal form. 3/15297 useless extension candidates. Maximal degree in co-relation 36536. Up to 17171 conditions per place. [2023-11-12 02:28:08,020 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 61 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-11-12 02:28:08,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 330 flow [2023-11-12 02:28:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:28:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:28:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1400 transitions. [2023-11-12 02:28:08,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2023-11-12 02:28:08,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1400 transitions. [2023-11-12 02:28:08,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1400 transitions. [2023-11-12 02:28:08,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:08,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1400 transitions. [2023-11-12 02:28:08,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,039 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,040 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 186 flow. Second operand 6 states and 1400 transitions. [2023-11-12 02:28:08,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 330 flow [2023-11-12 02:28:08,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:08,043 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 220 flow [2023-11-12 02:28:08,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-11-12 02:28:08,044 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-12 02:28:08,045 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 220 flow [2023-11-12 02:28:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:08,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:08,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:28:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:08,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:08,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672364, now seen corresponding path program 2 times [2023-11-12 02:28:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:08,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78894211] [2023-11-12 02:28:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78894211] [2023-11-12 02:28:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78894211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192270382] [2023-11-12 02:28:08,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:28:08,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:08,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:08,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:28:08,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:28:08,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:28:08,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:28:08,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:08,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-12 02:28:08,589 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:28:08,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:28:08,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-12 02:28:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:28:08,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:08,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192270382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:08,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:28:08,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-12 02:28:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975641602] [2023-11-12 02:28:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:28:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:28:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:28:08,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 495 [2023-11-12 02:28:08,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:08,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 495 [2023-11-12 02:28:08,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:11,096 INFO L124 PetriNetUnfolderBase]: 15291/24140 cut-off events. [2023-11-12 02:28:11,096 INFO L125 PetriNetUnfolderBase]: For 969/969 co-relation queries the response was YES. [2023-11-12 02:28:11,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47368 conditions, 24140 events. 15291/24140 cut-off events. For 969/969 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 168322 event pairs, 2043 based on Foata normal form. 0/19806 useless extension candidates. Maximal degree in co-relation 47332. Up to 16910 conditions per place. [2023-11-12 02:28:11,416 INFO L140 encePairwiseOnDemand]: 486/495 looper letters, 161 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2023-11-12 02:28:11,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 191 transitions, 827 flow [2023-11-12 02:28:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:28:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:28:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1444 transitions. [2023-11-12 02:28:11,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861952861952862 [2023-11-12 02:28:11,438 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1444 transitions. [2023-11-12 02:28:11,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1444 transitions. [2023-11-12 02:28:11,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:11,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1444 transitions. [2023-11-12 02:28:11,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:11,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:11,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:11,471 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 220 flow. Second operand 6 states and 1444 transitions. [2023-11-12 02:28:11,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 191 transitions, 827 flow [2023-11-12 02:28:11,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 191 transitions, 813 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:11,479 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 293 flow [2023-11-12 02:28:11,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-11-12 02:28:11,480 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-11-12 02:28:11,480 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 293 flow [2023-11-12 02:28:11,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:11,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:11,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:11,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:28:11,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:11,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash 215393085, now seen corresponding path program 1 times [2023-11-12 02:28:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:11,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328323585] [2023-11-12 02:28:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:28:11,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328323585] [2023-11-12 02:28:11,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328323585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50672372] [2023-11-12 02:28:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:11,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:28:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:11,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:28:11,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:11,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50672372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:11,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:11,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-12 02:28:11,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382622644] [2023-11-12 02:28:11,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:28:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:28:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:28:12,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 495 [2023-11-12 02:28:12,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 219.92857142857142) internal successors, (3079), 14 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:12,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:12,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 495 [2023-11-12 02:28:12,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:14,664 INFO L124 PetriNetUnfolderBase]: 15453/24354 cut-off events. [2023-11-12 02:28:14,664 INFO L125 PetriNetUnfolderBase]: For 4452/4452 co-relation queries the response was YES. [2023-11-12 02:28:14,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52283 conditions, 24354 events. 15453/24354 cut-off events. For 4452/4452 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 172740 event pairs, 213 based on Foata normal form. 31/21320 useless extension candidates. Maximal degree in co-relation 52226. Up to 21597 conditions per place. [2023-11-12 02:28:14,794 INFO L140 encePairwiseOnDemand]: 490/495 looper letters, 131 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2023-11-12 02:28:14,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 782 flow [2023-11-12 02:28:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:28:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:28:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3182 transitions. [2023-11-12 02:28:14,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45916305916305916 [2023-11-12 02:28:14,808 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3182 transitions. [2023-11-12 02:28:14,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3182 transitions. [2023-11-12 02:28:14,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:14,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3182 transitions. [2023-11-12 02:28:14,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 227.28571428571428) internal successors, (3182), 14 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 495.0) internal successors, (7425), 15 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:14,843 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 495.0) internal successors, (7425), 15 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:14,844 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 293 flow. Second operand 14 states and 3182 transitions. [2023-11-12 02:28:14,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 782 flow [2023-11-12 02:28:14,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 782 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:14,856 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 363 flow [2023-11-12 02:28:14,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=363, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-11-12 02:28:14,857 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-11-12 02:28:14,857 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 363 flow [2023-11-12 02:28:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 219.92857142857142) internal successors, (3079), 14 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:14,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:14,860 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 02:28:14,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:15,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd59b053-4026-4bd9-bf66-3e67e30fd20f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:28:15,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:28:15,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash 710183991, now seen corresponding path program 1 times [2023-11-12 02:28:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079985301] [2023-11-12 02:28:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:15,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:15,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:15,140 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:15,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:28:15,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:28:15,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:28:15,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:28:15,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:28:15,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:28:15,142 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-12 02:28:15,144 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:15,144 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:28:15,201 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:28:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,349 INFO L124 PetriNetUnfolderBase]: 120/697 cut-off events. [2023-11-12 02:28:15,349 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:28:15,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 697 events. 120/697 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3417 event pairs, 1 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 483. Up to 16 conditions per place. [2023-11-12 02:28:15,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,362 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:15,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 349 transitions, 725 flow [2023-11-12 02:28:15,501 INFO L124 PetriNetUnfolderBase]: 120/697 cut-off events. [2023-11-12 02:28:15,501 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:28:15,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 697 events. 120/697 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3417 event pairs, 1 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 483. Up to 16 conditions per place. [2023-11-12 02:28:15,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 74304 [2023-11-12 02:28:20,255 INFO L134 LiptonReduction]: Checked pairs total: 123861 [2023-11-12 02:28:20,255 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-11-12 02:28:20,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:20,258 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;@618ad4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:20,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:28:20,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:20,264 INFO L124 PetriNetUnfolderBase]: 10/34 cut-off events. [2023-11-12 02:28:20,264 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:28:20,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:20,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:20,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-12 02:28:20,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:20,265 INFO L85 PathProgramCache]: Analyzing trace with hash 142432956, now seen corresponding path program 1 times [2023-11-12 02:28:20,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027700623] [2023-11-12 02:28:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:20,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:20,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027700623] [2023-11-12 02:28:20,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027700623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:20,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:20,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026122600] [2023-11-12 02:28:20,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:20,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:20,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:20,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 619 [2023-11-12 02:28:20,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 144 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:20,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:20,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 619 [2023-11-12 02:28:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand