./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:40:57,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:40:57,473 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:40:57,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:40:57,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:40:57,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:40:57,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:40:57,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:40:57,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:40:57,507 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:40:57,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:40:57,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:40:57,509 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:40:57,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:40:57,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:40:57,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:40:57,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:40:57,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:40:57,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:40:57,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:40:57,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:40:57,515 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:40:57,515 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:40:57,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:40:57,516 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:40:57,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:40:57,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:40:57,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:40:57,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:40:57,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:40:57,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:40:57,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:40:57,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:40:57,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:40:57,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:40:57,522 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:40:57,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:40:57,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:40:57,524 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:40:57,524 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_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2023-11-06 22:40:57,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:40:57,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:40:57,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:40:57,910 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:40:57,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:40:57,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-06 22:41:01,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:41:01,361 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:41:01,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-06 22:41:01,378 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/data/de35e78c8/31dccb06f2a54d8a802346f8f204f6c9/FLAG05eb8e9b8 [2023-11-06 22:41:01,398 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/data/de35e78c8/31dccb06f2a54d8a802346f8f204f6c9 [2023-11-06 22:41:01,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:41:01,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:41:01,403 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:01,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:41:01,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:41:01,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:01,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbb3a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01, skipping insertion in model container [2023-11-06 22:41:01,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:01,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:41:01,804 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_6a5496c6-b19c-44c8-ad27-80db04c6bc90/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-11-06 22:41:01,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:01,847 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:41:01,886 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_6a5496c6-b19c-44c8-ad27-80db04c6bc90/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-11-06 22:41:01,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:01,959 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:41:01,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01 WrapperNode [2023-11-06 22:41:01,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:01,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:01,962 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:41:01,962 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:41:01,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,033 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-06 22:41:02,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:02,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:41:02,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:41:02,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:41:02,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,090 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:41:02,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:41:02,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:41:02,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:41:02,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (1/1) ... [2023-11-06 22:41:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:02,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:41:02,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:41:02,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:41:02,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:41:02,176 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:41:02,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:41:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:41:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:41:02,177 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:41:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:41:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:41:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:41:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:41:02,179 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:41:02,321 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:41:02,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:41:02,625 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:41:02,634 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:41:02,635 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 22:41:02,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02 BoogieIcfgContainer [2023-11-06 22:41:02,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:41:02,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:41:02,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:41:02,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:41:02,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:01" (1/3) ... [2023-11-06 22:41:02,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed5901d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container [2023-11-06 22:41:02,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:01" (2/3) ... [2023-11-06 22:41:02,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed5901d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container [2023-11-06 22:41:02,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02" (3/3) ... [2023-11-06 22:41:02,669 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-06 22:41:02,676 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:41:02,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:41:02,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:41:02,686 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:41:02,748 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:41:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 118 transitions, 243 flow [2023-11-06 22:41:02,859 INFO L124 PetriNetUnfolderBase]: 18/156 cut-off events. [2023-11-06 22:41:02,860 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:02,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 18/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 342 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-06 22:41:02,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 118 transitions, 243 flow [2023-11-06 22:41:02,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 113 transitions, 230 flow [2023-11-06 22:41:02,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:02,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 113 transitions, 230 flow [2023-11-06 22:41:02,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 113 transitions, 230 flow [2023-11-06 22:41:02,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 230 flow [2023-11-06 22:41:02,938 INFO L124 PetriNetUnfolderBase]: 17/151 cut-off events. [2023-11-06 22:41:02,938 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 151 events. 17/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-06 22:41:02,944 INFO L119 LiptonReduction]: Number of co-enabled transitions 2464 [2023-11-06 22:41:08,257 INFO L134 LiptonReduction]: Checked pairs total: 4216 [2023-11-06 22:41:08,258 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-11-06 22:41:08,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:08,293 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7341f924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:08,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:41:08,297 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:08,297 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-06 22:41:08,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:08,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:08,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:41:08,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:08,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash 14010920, now seen corresponding path program 1 times [2023-11-06 22:41:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:08,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394417957] [2023-11-06 22:41:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:08,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394417957] [2023-11-06 22:41:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394417957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:08,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:08,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:41:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848106148] [2023-11-06 22:41:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:08,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:08,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:08,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 222 [2023-11-06 22:41:08,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 222 [2023-11-06 22:41:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:08,809 INFO L124 PetriNetUnfolderBase]: 69/171 cut-off events. [2023-11-06 22:41:08,809 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:08,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-11-06 22:41:08,812 INFO L140 encePairwiseOnDemand]: 209/222 looper letters, 17 selfloop transitions, 2 changer transitions 8/29 dead transitions. [2023-11-06 22:41:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 116 flow [2023-11-06 22:41:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-06 22:41:08,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-11-06 22:41:08,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-06 22:41:08,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-06 22:41:08,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:08,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-06 22:41:08,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,857 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 68 flow. Second operand 3 states and 345 transitions. [2023-11-06 22:41:08,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 116 flow [2023-11-06 22:41:08,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:08,862 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-06 22:41:08,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-06 22:41:08,870 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-06 22:41:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-06 22:41:08,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:08,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:41:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:41:08,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:08,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 590001453, now seen corresponding path program 1 times [2023-11-06 22:41:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34284699] [2023-11-06 22:41:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:08,947 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:09,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:09,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:09,011 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:41:09,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:41:09,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:41:09,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:41:09,019 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:09,020 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:41:09,054 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:41:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,112 INFO L124 PetriNetUnfolderBase]: 32/250 cut-off events. [2023-11-06 22:41:09,112 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:41:09,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 250 events. 32/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 699 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-11-06 22:41:09,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:09,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 312 flow [2023-11-06 22:41:09,158 INFO L124 PetriNetUnfolderBase]: 32/250 cut-off events. [2023-11-06 22:41:09,159 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:41:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 250 events. 32/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 699 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-11-06 22:41:09,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 7112 [2023-11-06 22:41:14,138 INFO L134 LiptonReduction]: Checked pairs total: 17479 [2023-11-06 22:41:14,139 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-06 22:41:14,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:14,143 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7341f924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:14,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:41:14,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:14,146 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-11-06 22:41:14,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:14,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:14,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:41:14,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:14,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash 23061978, now seen corresponding path program 1 times [2023-11-06 22:41:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652627931] [2023-11-06 22:41:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:14,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652627931] [2023-11-06 22:41:14,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652627931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:14,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:41:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442407790] [2023-11-06 22:41:14,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:14,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 264 [2023-11-06 22:41:14,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:14,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 264 [2023-11-06 22:41:14,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:14,698 INFO L124 PetriNetUnfolderBase]: 1627/2904 cut-off events. [2023-11-06 22:41:14,698 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-06 22:41:14,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5629 conditions, 2904 events. 1627/2904 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16609 event pairs, 562 based on Foata normal form. 522/3135 useless extension candidates. Maximal degree in co-relation 3943. Up to 2412 conditions per place. [2023-11-06 22:41:14,713 INFO L140 encePairwiseOnDemand]: 246/264 looper letters, 32 selfloop transitions, 3 changer transitions 14/57 dead transitions. [2023-11-06 22:41:14,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 231 flow [2023-11-06 22:41:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-11-06 22:41:14,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-06 22:41:14,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-11-06 22:41:14,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-11-06 22:41:14,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:14,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-11-06 22:41:14,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,731 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 432 transitions. [2023-11-06 22:41:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 231 flow [2023-11-06 22:41:14,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:14,736 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 93 flow [2023-11-06 22:41:14,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-06 22:41:14,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-06 22:41:14,738 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 93 flow [2023-11-06 22:41:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:14,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:41:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:41:14,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:14,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1523464002, now seen corresponding path program 1 times [2023-11-06 22:41:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:14,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350260456] [2023-11-06 22:41:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:14,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:14,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:14,827 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:14,828 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:41:14,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:41:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:41:14,829 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:41:14,829 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:14,830 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:41:14,867 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:41:14,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:14,930 INFO L124 PetriNetUnfolderBase]: 51/379 cut-off events. [2023-11-06 22:41:14,931 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:41:14,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 379 events. 51/379 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1215 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 258. Up to 16 conditions per place. [2023-11-06 22:41:14,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:14,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:14,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:14,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:14,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:14,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 178 transitions, 383 flow [2023-11-06 22:41:15,020 INFO L124 PetriNetUnfolderBase]: 51/379 cut-off events. [2023-11-06 22:41:15,020 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:41:15,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 379 events. 51/379 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1215 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 258. Up to 16 conditions per place. [2023-11-06 22:41:15,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 13272 [2023-11-06 22:41:20,765 INFO L134 LiptonReduction]: Checked pairs total: 37369 [2023-11-06 22:41:20,766 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-11-06 22:41:20,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:20,769 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7341f924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:20,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:41:20,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:20,772 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-06 22:41:20,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:20,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:20,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:41:20,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:20,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash 33527294, now seen corresponding path program 1 times [2023-11-06 22:41:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:20,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163689365] [2023-11-06 22:41:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163689365] [2023-11-06 22:41:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163689365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:20,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:41:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370665835] [2023-11-06 22:41:20,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:20,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:20,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 310 [2023-11-06 22:41:20,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:20,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:20,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 310 [2023-11-06 22:41:20,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:25,348 INFO L124 PetriNetUnfolderBase]: 23764/35555 cut-off events. [2023-11-06 22:41:25,348 INFO L125 PetriNetUnfolderBase]: For 1093/1093 co-relation queries the response was YES. [2023-11-06 22:41:25,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69806 conditions, 35555 events. 23764/35555 cut-off events. For 1093/1093 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 241166 event pairs, 10042 based on Foata normal form. 7127/40030 useless extension candidates. Maximal degree in co-relation 38074. Up to 32541 conditions per place. [2023-11-06 22:41:25,548 INFO L140 encePairwiseOnDemand]: 284/310 looper letters, 44 selfloop transitions, 4 changer transitions 15/74 dead transitions. [2023-11-06 22:41:25,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 311 flow [2023-11-06 22:41:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-11-06 22:41:25,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2023-11-06 22:41:25,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-11-06 22:41:25,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-11-06 22:41:25,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:25,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-11-06 22:41:25,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,566 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 179 flow. Second operand 3 states and 516 transitions. [2023-11-06 22:41:25,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 311 flow [2023-11-06 22:41:25,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 311 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:25,582 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 132 flow [2023-11-06 22:41:25,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-06 22:41:25,585 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-11-06 22:41:25,589 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 132 flow [2023-11-06 22:41:25,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:25,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:41:25,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:25,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 257726343, now seen corresponding path program 1 times [2023-11-06 22:41:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:25,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657906543] [2023-11-06 22:41:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:25,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657906543] [2023-11-06 22:41:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657906543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949785655] [2023-11-06 22:41:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:25,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:25,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:25,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:25,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:41:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:25,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:41:25,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:26,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949785655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:26,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:41:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260383456] [2023-11-06 22:41:26,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:26,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:41:26,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:41:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:41:26,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 310 [2023-11-06 22:41:26,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:26,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:26,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 310 [2023-11-06 22:41:26,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:27,808 INFO L124 PetriNetUnfolderBase]: 5560/9099 cut-off events. [2023-11-06 22:41:27,809 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2023-11-06 22:41:27,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18367 conditions, 9099 events. 5560/9099 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 60666 event pairs, 64 based on Foata normal form. 0/9097 useless extension candidates. Maximal degree in co-relation 9068. Up to 5346 conditions per place. [2023-11-06 22:41:27,870 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 87 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-11-06 22:41:27,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 102 transitions, 450 flow [2023-11-06 22:41:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:41:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:41:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-11-06 22:41:27,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016129032258064 [2023-11-06 22:41:27,875 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-11-06 22:41:27,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-11-06 22:41:27,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:27,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-11-06 22:41:27,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:27,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:27,887 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:27,887 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 132 flow. Second operand 6 states and 933 transitions. [2023-11-06 22:41:27,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 102 transitions, 450 flow [2023-11-06 22:41:27,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 438 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:27,894 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 130 flow [2023-11-06 22:41:27,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-06 22:41:27,895 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-11-06 22:41:27,895 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 130 flow [2023-11-06 22:41:27,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:27,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:27,897 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:41:27,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:28,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a5496c6-b19c-44c8-ad27-80db04c6bc90/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:41:28,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:28,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash 776485529, now seen corresponding path program 1 times [2023-11-06 22:41:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:28,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000325858] [2023-11-06 22:41:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:28,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:28,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:28,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:28,173 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:28,173 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-06 22:41:28,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 22:41:28,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:41:28,174 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:41:28,175 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:28,175 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:41:28,207 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:41:28,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,296 INFO L124 PetriNetUnfolderBase]: 82/580 cut-off events. [2023-11-06 22:41:28,297 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:41:28,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 580 events. 82/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2168 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 399. Up to 32 conditions per place. [2023-11-06 22:41:28,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,308 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:28,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 208 transitions, 456 flow [2023-11-06 22:41:28,386 INFO L124 PetriNetUnfolderBase]: 82/580 cut-off events. [2023-11-06 22:41:28,387 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:41:28,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 580 events. 82/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2168 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 399. Up to 32 conditions per place. [2023-11-06 22:41:28,419 INFO L119 LiptonReduction]: Number of co-enabled transitions 21168 [2023-11-06 22:41:34,760 INFO L134 LiptonReduction]: Checked pairs total: 63045 [2023-11-06 22:41:34,761 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-06 22:41:34,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:34,764 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7341f924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:34,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:41:34,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:34,767 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-06 22:41:34,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:34,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:41:34,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:34,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 45379819, now seen corresponding path program 1 times [2023-11-06 22:41:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70296074] [2023-11-06 22:41:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:34,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70296074] [2023-11-06 22:41:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70296074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:34,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:34,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891380504] [2023-11-06 22:41:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:34,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 355 [2023-11-06 22:41:34,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:34,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 355 [2023-11-06 22:41:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:03,615 INFO L124 PetriNetUnfolderBase]: 212870/297054 cut-off events. [2023-11-06 22:42:03,616 INFO L125 PetriNetUnfolderBase]: For 12048/12048 co-relation queries the response was YES. [2023-11-06 22:42:04,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582021 conditions, 297054 events. 212870/297054 cut-off events. For 12048/12048 co-relation queries the response was YES. Maximal size of possible extension queue 6768. Compared 2316233 event pairs, 172774 based on Foata normal form. 50829/328008 useless extension candidates. Maximal degree in co-relation 56036. Up to 278951 conditions per place. [2023-11-06 22:42:05,012 INFO L140 encePairwiseOnDemand]: 325/355 looper letters, 46 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2023-11-06 22:42:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 308 flow [2023-11-06 22:42:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-11-06 22:42:05,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483568075117371 [2023-11-06 22:42:05,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-11-06 22:42:05,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-11-06 22:42:05,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:05,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-11-06 22:42:05,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,024 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 230 flow. Second operand 3 states and 584 transitions. [2023-11-06 22:42:05,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 308 flow [2023-11-06 22:42:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:05,036 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-06 22:42:05,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-06 22:42:05,039 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-11-06 22:42:05,039 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-06 22:42:05,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:05,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:05,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:42:05,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:42:05,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1928336122, now seen corresponding path program 1 times [2023-11-06 22:42:05,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806741611] [2023-11-06 22:42:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806741611] [2023-11-06 22:42:05,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806741611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351600744] [2023-11-06 22:42:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:05,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:05,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 355 [2023-11-06 22:42:05,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:05,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:05,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 355 [2023-11-06 22:42:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand