./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/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_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/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_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:05,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:05,439 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:27:05,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:05,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:05,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:05,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:05,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:05,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:05,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:05,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:05,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:05,506 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:05,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:05,508 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:27:05,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:05,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:05,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:05,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:05,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:27:05,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:05,512 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:27:05,512 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:05,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:27:05,513 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:05,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:05,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:05,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:05,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:05,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:05,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:05,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:27:05,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:05,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:05,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:05,518 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:27:05,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:05,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:05,519 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:05,519 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_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2023-11-12 02:27:05,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:05,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:05,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:05,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:05,902 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:05,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-11-12 02:27:08,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:09,307 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:09,308 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-11-12 02:27:09,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/data/9d3470c8c/589c362287c44b3c89edb82a3cd6d72f/FLAG27634018e [2023-11-12 02:27:09,347 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/data/9d3470c8c/589c362287c44b3c89edb82a3cd6d72f [2023-11-12 02:27:09,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:09,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:09,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:09,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:09,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:09,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:09" (1/1) ... [2023-11-12 02:27:09,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97fb0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:09, skipping insertion in model container [2023-11-12 02:27:09,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:09" (1/1) ... [2023-11-12 02:27:09,431 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:09,890 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_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2023-11-12 02:27:09,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:09,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:09,965 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_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2023-11-12 02:27:09,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:10,021 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:10,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10 WrapperNode [2023-11-12 02:27:10,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:10,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:10,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:10,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:10,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,101 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-11-12 02:27:10,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:10,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:10,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:10,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:10,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:10,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:10,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:10,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:10,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (1/1) ... [2023-11-12 02:27:10,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:10,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:10,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:10,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:10,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:10,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:27:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:27:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:27:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:10,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:10,243 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 02:27:10,412 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:10,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:10,604 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:10,613 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:10,613 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-12 02:27:10,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:10 BoogieIcfgContainer [2023-11-12 02:27:10,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:10,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:10,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:10,631 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:10,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:09" (1/3) ... [2023-11-12 02:27:10,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f098f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:10, skipping insertion in model container [2023-11-12 02:27:10,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:10" (2/3) ... [2023-11-12 02:27:10,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f098f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:10, skipping insertion in model container [2023-11-12 02:27:10,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:10" (3/3) ... [2023-11-12 02:27:10,636 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-11-12 02:27:10,649 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:27:10,661 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:10,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:27:10,663 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:27:10,770 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:27:10,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,918 INFO L124 PetriNetUnfolderBase]: 14/138 cut-off events. [2023-11-12 02:27:10,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 138 events. 14/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 321 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-11-12 02:27:10,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:10,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,946 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 210 flow [2023-11-12 02:27:10,981 INFO L124 PetriNetUnfolderBase]: 14/138 cut-off events. [2023-11-12 02:27:10,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:10,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 138 events. 14/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 321 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-11-12 02:27:10,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2023-11-12 02:27:14,335 INFO L134 LiptonReduction]: Checked pairs total: 4687 [2023-11-12 02:27:14,335 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-12 02:27:14,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:14,359 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;@70639815, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:14,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:14,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:14,364 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:27:14,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:14,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:14,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:27:14,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:14,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 12361116, now seen corresponding path program 1 times [2023-11-12 02:27:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142735632] [2023-11-12 02:27:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:14,687 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 02:27:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142735632] [2023-11-12 02:27:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142735632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:14,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558135955] [2023-11-12 02:27:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:14,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 193 [2023-11-12 02:27:14,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 02:27:14,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:14,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 193 [2023-11-12 02:27:14,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:14,912 INFO L124 PetriNetUnfolderBase]: 72/176 cut-off events. [2023-11-12 02:27:14,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 324. Up to 153 conditions per place. [2023-11-12 02:27:14,918 INFO L140 encePairwiseOnDemand]: 182/193 looper letters, 24 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-11-12 02:27:14,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 126 flow [2023-11-12 02:27:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-12 02:27:14,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164075993091537 [2023-11-12 02:27:14,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-12 02:27:14,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-12 02:27:14,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:14,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-12 02:27:14,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 02:27:14,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 02:27:14,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 02:27:14,973 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 64 flow. Second operand 3 states and 299 transitions. [2023-11-12 02:27:14,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 126 flow [2023-11-12 02:27:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:14,979 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 50 flow [2023-11-12 02:27:14,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-11-12 02:27:14,986 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-12 02:27:14,986 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 50 flow [2023-11-12 02:27:14,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 02:27:14,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:14,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:27:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:14,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:14,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1019987058, now seen corresponding path program 1 times [2023-11-12 02:27:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:14,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092639513] [2023-11-12 02:27:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:15,024 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:15,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:15,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:15,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:27:15,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:27:15,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:27:15,072 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:27:15,075 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:15,076 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:27:15,104 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:27:15,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,167 INFO L124 PetriNetUnfolderBase]: 24/211 cut-off events. [2023-11-12 02:27:15,167 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:27:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 211 events. 24/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 609 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-11-12 02:27:15,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,176 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:15,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 282 flow [2023-11-12 02:27:15,212 INFO L124 PetriNetUnfolderBase]: 24/211 cut-off events. [2023-11-12 02:27:15,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:27:15,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 211 events. 24/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 609 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-11-12 02:27:15,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 7360 [2023-11-12 02:27:18,756 INFO L134 LiptonReduction]: Checked pairs total: 14476 [2023-11-12 02:27:18,756 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-11-12 02:27:18,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:18,760 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;@70639815, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:18,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:18,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:18,763 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:27:18,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:27:18,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:18,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash 20857813, now seen corresponding path program 1 times [2023-11-12 02:27:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329739533] [2023-11-12 02:27:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,836 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 02:27:18,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329739533] [2023-11-12 02:27:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329739533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:18,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:18,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373953790] [2023-11-12 02:27:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:18,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 243 [2023-11-12 02:27:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 02:27:18,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:18,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 243 [2023-11-12 02:27:18,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:19,247 INFO L124 PetriNetUnfolderBase]: 1441/2556 cut-off events. [2023-11-12 02:27:19,247 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-12 02:27:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4935 conditions, 2556 events. 1441/2556 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 14550 event pairs, 640 based on Foata normal form. 360/2676 useless extension candidates. Maximal degree in co-relation 472. Up to 2332 conditions per place. [2023-11-12 02:27:19,260 INFO L140 encePairwiseOnDemand]: 226/243 looper letters, 34 selfloop transitions, 2 changer transitions 3/46 dead transitions. [2023-11-12 02:27:19,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 180 flow [2023-11-12 02:27:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-12 02:27:19,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390946502057613 [2023-11-12 02:27:19,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-12 02:27:19,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-12 02:27:19,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:19,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-12 02:27:19,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 02:27:19,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 02:27:19,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 02:27:19,269 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 108 flow. Second operand 3 states and 393 transitions. [2023-11-12 02:27:19,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 180 flow [2023-11-12 02:27:19,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:19,272 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 86 flow [2023-11-12 02:27:19,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-11-12 02:27:19,273 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-12 02:27:19,273 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 86 flow [2023-11-12 02:27:19,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 02:27:19,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:19,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:19,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:27:19,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:19,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash -967498368, now seen corresponding path program 1 times [2023-11-12 02:27:19,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:19,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469333127] [2023-11-12 02:27:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:19,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:19,356 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 02:27:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469333127] [2023-11-12 02:27:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469333127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256515942] [2023-11-12 02:27:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:19,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:19,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:27:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:19,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:19,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:19,536 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 02:27:19,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:19,559 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 02:27:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256515942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:19,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:27:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869852895] [2023-11-12 02:27:19,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:19,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-11-12 02:27:19,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 02:27:19,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:19,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-11-12 02:27:19,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:19,818 INFO L124 PetriNetUnfolderBase]: 421/832 cut-off events. [2023-11-12 02:27:19,818 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-12 02:27:19,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 832 events. 421/832 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4189 event pairs, 80 based on Foata normal form. 100/930 useless extension candidates. Maximal degree in co-relation 1459. Up to 502 conditions per place. [2023-11-12 02:27:19,826 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-12 02:27:19,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-11-12 02:27:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-11-12 02:27:19,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2023-11-12 02:27:19,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-11-12 02:27:19,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-11-12 02:27:19,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:19,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-11-12 02:27:19,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states 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 02:27:19,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 02:27:19,837 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 02:27:19,837 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 86 flow. Second operand 5 states and 603 transitions. [2023-11-12 02:27:19,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-11-12 02:27:19,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:19,841 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-12 02:27:19,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-12 02:27:19,842 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-12 02:27:19,842 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-12 02:27:19,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 02:27:19,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:19,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:27:19,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:20,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:20,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:20,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash 483938778, now seen corresponding path program 1 times [2023-11-12 02:27:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751623018] [2023-11-12 02:27:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:20,072 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:20,105 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:20,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:20,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:27:20,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:27:20,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:27:20,112 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:27:20,113 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:20,114 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:27:20,139 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:27:20,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,180 INFO L124 PetriNetUnfolderBase]: 34/284 cut-off events. [2023-11-12 02:27:20,180 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:27:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 891 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-11-12 02:27:20,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,186 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:20,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 356 flow [2023-11-12 02:27:20,243 INFO L124 PetriNetUnfolderBase]: 34/284 cut-off events. [2023-11-12 02:27:20,243 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:27:20,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 891 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-11-12 02:27:20,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 14208 [2023-11-12 02:27:24,016 INFO L134 LiptonReduction]: Checked pairs total: 29589 [2023-11-12 02:27:24,016 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-12 02:27:24,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:24,020 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;@70639815, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:24,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:24,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:24,023 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:27:24,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:24,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:24,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:27:24,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:24,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 30922725, now seen corresponding path program 1 times [2023-11-12 02:27:24,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:24,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197280544] [2023-11-12 02:27:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:24,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:24,081 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 02:27:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197280544] [2023-11-12 02:27:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197280544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:24,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:24,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299175133] [2023-11-12 02:27:24,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:24,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:24,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:24,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 294 [2023-11-12 02:27:24,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 02:27:24,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 294 [2023-11-12 02:27:24,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:28,038 INFO L124 PetriNetUnfolderBase]: 20233/30015 cut-off events. [2023-11-12 02:27:28,038 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-11-12 02:27:28,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58825 conditions, 30015 events. 20233/30015 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 197804 event pairs, 19318 based on Foata normal form. 5058/33005 useless extension candidates. Maximal degree in co-relation 22879. Up to 28406 conditions per place. [2023-11-12 02:27:28,252 INFO L140 encePairwiseOnDemand]: 271/294 looper letters, 42 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-11-12 02:27:28,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 226 flow [2023-11-12 02:27:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-11-12 02:27:28,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498866213151927 [2023-11-12 02:27:28,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-11-12 02:27:28,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-11-12 02:27:28,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:28,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-11-12 02:27:28,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 02:27:28,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 02:27:28,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 02:27:28,263 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 152 flow. Second operand 3 states and 485 transitions. [2023-11-12 02:27:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 226 flow [2023-11-12 02:27:28,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 224 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:28,269 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 116 flow [2023-11-12 02:27:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=116, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-11-12 02:27:28,273 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-11-12 02:27:28,273 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 116 flow [2023-11-12 02:27:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 02:27:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:28,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:28,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:27:28,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2134312268, now seen corresponding path program 1 times [2023-11-12 02:27:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:28,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720788226] [2023-11-12 02:27:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:28,377 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 02:27:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720788226] [2023-11-12 02:27:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720788226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864305696] [2023-11-12 02:27:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:28,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:28,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:28,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:27:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:28,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:28,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:28,502 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 02:27:28,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:28,527 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 02:27:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864305696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:28,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:28,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:27:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134148736] [2023-11-12 02:27:28,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:28,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:28,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 294 [2023-11-12 02:27:28,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:27:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 294 [2023-11-12 02:27:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:30,007 INFO L124 PetriNetUnfolderBase]: 6205/10135 cut-off events. [2023-11-12 02:27:30,008 INFO L125 PetriNetUnfolderBase]: For 3438/3438 co-relation queries the response was YES. [2023-11-12 02:27:30,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 10135 events. 6205/10135 cut-off events. For 3438/3438 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67457 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2316. Up to 5958 conditions per place. [2023-11-12 02:27:30,085 INFO L140 encePairwiseOnDemand]: 291/294 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-11-12 02:27:30,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 390 flow [2023-11-12 02:27:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:27:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:27:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 905 transitions. [2023-11-12 02:27:30,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130385487528345 [2023-11-12 02:27:30,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 905 transitions. [2023-11-12 02:27:30,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 905 transitions. [2023-11-12 02:27:30,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:30,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 905 transitions. [2023-11-12 02:27:30,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.83333333333334) internal successors, (905), 6 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 02:27:30,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states 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 02:27:30,114 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states 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 02:27:30,114 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 116 flow. Second operand 6 states and 905 transitions. [2023-11-12 02:27:30,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 390 flow [2023-11-12 02:27:30,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:30,130 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-12 02:27:30,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-12 02:27:30,132 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-11-12 02:27:30,136 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-12 02:27:30,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:27:30,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:30,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:27:30,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:30,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a8b0854-6dc9-4b0a-8c4f-976bbbaa350d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:30,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:30,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2072796167, now seen corresponding path program 1 times [2023-11-12 02:27:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715035028] [2023-11-12 02:27:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:30,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:30,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:30,429 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:30,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:27:30,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:27:30,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:27:30,430 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:27:30,431 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:30,431 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:27:30,468 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:27:30,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,546 INFO L124 PetriNetUnfolderBase]: 44/357 cut-off events. [2023-11-12 02:27:30,546 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:27:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 357 events. 44/357 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1190 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2023-11-12 02:27:30,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:30,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 432 flow [2023-11-12 02:27:30,612 INFO L124 PetriNetUnfolderBase]: 44/357 cut-off events. [2023-11-12 02:27:30,612 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:27:30,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 357 events. 44/357 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1190 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2023-11-12 02:27:30,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 23168 [2023-11-12 02:27:35,075 INFO L134 LiptonReduction]: Checked pairs total: 52545 [2023-11-12 02:27:35,076 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-12 02:27:35,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:35,078 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;@70639815, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:35,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:35,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:35,081 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:27:35,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:27:35,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:35,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash 42713709, now seen corresponding path program 1 times [2023-11-12 02:27:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149614869] [2023-11-12 02:27:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:35,113 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 02:27:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:35,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149614869] [2023-11-12 02:27:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149614869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:35,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:35,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249089947] [2023-11-12 02:27:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:35,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:35,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 350 [2023-11-12 02:27:35,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 02:27:35,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:35,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 350 [2023-11-12 02:27:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand