./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/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_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/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_4bd7afca-dfbd-4812-984c-6581672a4574/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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:45:50,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:45:50,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:45:50,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:45:50,392 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:45:50,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:45:50,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:45:50,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:45:50,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:45:50,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:45:50,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:45:50,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:45:50,459 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:45:50,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:45:50,462 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:45:50,462 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:45:50,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:45:50,463 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:45:50,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:45:50,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:45:50,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:45:50,466 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:45:50,468 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:45:50,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:45:50,469 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:45:50,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:45:50,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:45:50,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:45:50,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:50,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:45:50,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:45:50,474 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:45:50,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:45:50,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:45:50,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:45:50,476 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:45:50,476 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:45:50,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:45:50,485 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:45:50,485 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_4bd7afca-dfbd-4812-984c-6581672a4574/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2023-11-06 22:45:50,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:45:50,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:45:50,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:45:50,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:45:50,933 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:45:50,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-06 22:45:54,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:45:54,658 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:45:54,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-06 22:45:54,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/data/c069a2ab7/982f1c019eb04ed9ad615e7b7afb78b6/FLAGfe78ec018 [2023-11-06 22:45:54,706 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/data/c069a2ab7/982f1c019eb04ed9ad615e7b7afb78b6 [2023-11-06 22:45:54,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:45:54,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:45:54,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:54,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:45:54,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:45:54,730 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:54" (1/1) ... [2023-11-06 22:45:54,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2589e173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:54, skipping insertion in model container [2023-11-06 22:45:54,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:54" (1/1) ... [2023-11-06 22:45:54,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:45:55,187 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_4bd7afca-dfbd-4812-984c-6581672a4574/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-06 22:45:55,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:55,256 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:45:55,324 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_4bd7afca-dfbd-4812-984c-6581672a4574/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-06 22:45:55,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:55,418 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:45:55,427 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:45:55,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55 WrapperNode [2023-11-06 22:45:55,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:55,429 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:55,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:45:55,430 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:45:55,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,514 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 136 [2023-11-06 22:45:55,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:55,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:45:55,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:45:55,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:45:55,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:45:55,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:45:55,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:45:55,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:45:55,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (1/1) ... [2023-11-06 22:45:55,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:55,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:45:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:45:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:45:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:45:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:45:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:45:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:45:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:45:55,693 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:45:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:45:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:45:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:45:55,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:45:55,698 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 22:45:55,972 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:45:55,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:45:56,419 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:45:56,430 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:45:56,436 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 22:45:56,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:56 BoogieIcfgContainer [2023-11-06 22:45:56,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:45:56,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:45:56,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:45:56,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:45:56,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:54" (1/3) ... [2023-11-06 22:45:56,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d3b2a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:56, skipping insertion in model container [2023-11-06 22:45:56,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:55" (2/3) ... [2023-11-06 22:45:56,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d3b2a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:56, skipping insertion in model container [2023-11-06 22:45:56,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:56" (3/3) ... [2023-11-06 22:45:56,456 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-06 22:45:56,469 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:45:56,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:45:56,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:45:56,485 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:45:56,595 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:45:56,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 297 flow [2023-11-06 22:45:56,746 INFO L124 PetriNetUnfolderBase]: 26/224 cut-off events. [2023-11-06 22:45:56,746 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:45:56,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 224 events. 26/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 613 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-11-06 22:45:56,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 145 transitions, 297 flow [2023-11-06 22:45:56,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 140 transitions, 284 flow [2023-11-06 22:45:56,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:45:56,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 140 transitions, 284 flow [2023-11-06 22:45:56,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 140 transitions, 284 flow [2023-11-06 22:45:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 140 transitions, 284 flow [2023-11-06 22:45:56,849 INFO L124 PetriNetUnfolderBase]: 25/219 cut-off events. [2023-11-06 22:45:56,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:45:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 219 events. 25/219 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 562 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-11-06 22:45:56,857 INFO L119 LiptonReduction]: Number of co-enabled transitions 3740 [2023-11-06 22:46:01,865 INFO L134 LiptonReduction]: Checked pairs total: 5336 [2023-11-06 22:46:01,866 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-11-06 22:46:01,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:01,901 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;@a42a454, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:01,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:46:01,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:01,910 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-06 22:46:01,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:01,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:01,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:01,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:01,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1110820815, now seen corresponding path program 1 times [2023-11-06 22:46:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:01,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097206925] [2023-11-06 22:46:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:02,411 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 22:46:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097206925] [2023-11-06 22:46:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097206925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:02,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:46:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088660604] [2023-11-06 22:46:02,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:02,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:02,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 278 [2023-11-06 22:46:02,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 22:46:02,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:02,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 278 [2023-11-06 22:46:02,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:02,647 INFO L124 PetriNetUnfolderBase]: 98/232 cut-off events. [2023-11-06 22:46:02,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:02,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 232 events. 98/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 844 event pairs, 32 based on Foata normal form. 29/219 useless extension candidates. Maximal degree in co-relation 406. Up to 116 conditions per place. [2023-11-06 22:46:02,658 INFO L140 encePairwiseOnDemand]: 264/278 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2023-11-06 22:46:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 146 flow [2023-11-06 22:46:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-11-06 22:46:02,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203836930455635 [2023-11-06 22:46:02,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-11-06 22:46:02,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-11-06 22:46:02,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:02,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-11-06 22:46:02,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 22:46:02,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 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 22:46:02,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 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 22:46:02,709 INFO L175 Difference]: Start difference. First operand has 25 places, 32 transitions, 68 flow. Second operand 3 states and 434 transitions. [2023-11-06 22:46:02,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 146 flow [2023-11-06 22:46:02,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:02,716 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 68 flow [2023-11-06 22:46:02,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-06 22:46:02,724 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-06 22:46:02,724 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 68 flow [2023-11-06 22:46:02,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 22:46:02,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:02,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:46:02,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:46:02,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:02,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1110801495, now seen corresponding path program 1 times [2023-11-06 22:46:02,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:02,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088585507] [2023-11-06 22:46:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:02,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:02,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:46:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:02,809 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:46:02,809 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:46:02,811 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:46:02,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:46:02,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:46:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:46:02,816 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:46:02,819 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:46:02,820 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:46:02,849 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:46:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,928 INFO L124 PetriNetUnfolderBase]: 43/353 cut-off events. [2023-11-06 22:46:02,929 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:46:02,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 353 events. 43/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1272 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 226. Up to 9 conditions per place. [2023-11-06 22:46:02,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:02,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 354 flow [2023-11-06 22:46:02,992 INFO L124 PetriNetUnfolderBase]: 43/353 cut-off events. [2023-11-06 22:46:02,993 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:46:02,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 353 events. 43/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1272 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 226. Up to 9 conditions per place. [2023-11-06 22:46:03,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 8932 [2023-11-06 22:46:07,984 INFO L134 LiptonReduction]: Checked pairs total: 14973 [2023-11-06 22:46:07,984 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-11-06 22:46:07,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:07,990 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;@a42a454, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:07,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:46:07,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:07,996 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:46:07,997 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:46:07,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:07,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:07,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:46:07,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash 475326042, now seen corresponding path program 1 times [2023-11-06 22:46:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676001030] [2023-11-06 22:46:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:08,100 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 22:46:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676001030] [2023-11-06 22:46:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676001030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:08,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:08,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:46:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212030428] [2023-11-06 22:46:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 320 [2023-11-06 22:46:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 22:46:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:08,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 320 [2023-11-06 22:46:08,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:08,716 INFO L124 PetriNetUnfolderBase]: 2025/3419 cut-off events. [2023-11-06 22:46:08,717 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-06 22:46:08,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6804 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18056 event pairs, 856 based on Foata normal form. 106/2977 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2023-11-06 22:46:08,739 INFO L140 encePairwiseOnDemand]: 303/320 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-06 22:46:08,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 262 flow [2023-11-06 22:46:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-11-06 22:46:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2023-11-06 22:46:08,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-11-06 22:46:08,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-11-06 22:46:08,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:08,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-11-06 22:46:08,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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 22:46:08,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 22:46:08,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 22:46:08,762 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 110 flow. Second operand 3 states and 515 transitions. [2023-11-06 22:46:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 262 flow [2023-11-06 22:46:08,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:08,770 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 130 flow [2023-11-06 22:46:08,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-06 22:46:08,771 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-06 22:46:08,772 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 130 flow [2023-11-06 22:46:08,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 22:46:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:46:08,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:46:08,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:46:08,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:08,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1502168771, now seen corresponding path program 1 times [2023-11-06 22:46:08,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:08,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74904061] [2023-11-06 22:46:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:08,834 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:46:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:08,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:46:08,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:46:08,875 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:46:08,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:46:08,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:46:08,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:46:08,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:46:08,877 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:46:08,878 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:46:08,878 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:46:08,907 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:46:08,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:08,991 INFO L124 PetriNetUnfolderBase]: 65/517 cut-off events. [2023-11-06 22:46:08,991 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:46:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2106 event pairs, 1 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2023-11-06 22:46:08,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:09,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:09,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:09,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:09,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:09,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 193 transitions, 413 flow [2023-11-06 22:46:09,080 INFO L124 PetriNetUnfolderBase]: 65/517 cut-off events. [2023-11-06 22:46:09,081 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:46:09,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2106 event pairs, 1 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2023-11-06 22:46:09,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 15048 [2023-11-06 22:46:14,150 INFO L134 LiptonReduction]: Checked pairs total: 23977 [2023-11-06 22:46:14,151 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-11-06 22:46:14,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:14,155 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;@a42a454, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:14,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:46:14,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:14,160 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 22:46:14,160 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:46:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:14,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:46:14,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -786827233, now seen corresponding path program 1 times [2023-11-06 22:46:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533459773] [2023-11-06 22:46:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:14,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:14,224 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 22:46:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533459773] [2023-11-06 22:46:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533459773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:14,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:14,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:46:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894045771] [2023-11-06 22:46:14,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:14,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 369 [2023-11-06 22:46:14,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 59 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:46:14,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:14,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 369 [2023-11-06 22:46:14,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:17,770 INFO L124 PetriNetUnfolderBase]: 15781/23479 cut-off events. [2023-11-06 22:46:17,771 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2023-11-06 22:46:17,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46804 conditions, 23479 events. 15781/23479 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 151371 event pairs, 7226 based on Foata normal form. 2702/22583 useless extension candidates. Maximal degree in co-relation 5992. Up to 11852 conditions per place. [2023-11-06 22:46:17,962 INFO L140 encePairwiseOnDemand]: 347/369 looper letters, 63 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-06 22:46:17,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 320 flow [2023-11-06 22:46:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-11-06 22:46:17,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2023-11-06 22:46:17,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-11-06 22:46:17,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-11-06 22:46:17,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:17,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-11-06 22:46:17,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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 22:46:17,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 22:46:17,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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 22:46:17,990 INFO L175 Difference]: Start difference. First operand has 47 places, 59 transitions, 145 flow. Second operand 3 states and 588 transitions. [2023-11-06 22:46:17,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 320 flow [2023-11-06 22:46:17,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:18,001 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 159 flow [2023-11-06 22:46:18,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-06 22:46:18,006 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-06 22:46:18,008 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 159 flow [2023-11-06 22:46:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:46:18,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:18,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:46:18,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:46:18,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1185491263, now seen corresponding path program 1 times [2023-11-06 22:46:18,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:18,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758918647] [2023-11-06 22:46:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:18,135 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 22:46:18,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758918647] [2023-11-06 22:46:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758918647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224968439] [2023-11-06 22:46:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:18,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:18,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:18,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:46:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:18,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:46:18,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:18,391 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 22:46:18,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:18,431 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 22:46:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224968439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:18,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:18,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:46:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284818370] [2023-11-06 22:46:18,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:18,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:18,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:18,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 369 [2023-11-06 22:46:18,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 161.71428571428572) internal successors, (1132), 7 states have internal predecessors, (1132), 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 22:46:18,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:18,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 369 [2023-11-06 22:46:18,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:18,793 INFO L124 PetriNetUnfolderBase]: 1078/1807 cut-off events. [2023-11-06 22:46:18,794 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2023-11-06 22:46:18,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 1807 events. 1078/1807 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9477 event pairs, 0 based on Foata normal form. 0/1806 useless extension candidates. Maximal degree in co-relation 3722. Up to 1030 conditions per place. [2023-11-06 22:46:18,810 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 45 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-06 22:46:18,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 236 flow [2023-11-06 22:46:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:46:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:46:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1007 transitions. [2023-11-06 22:46:18,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483288166214997 [2023-11-06 22:46:18,817 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1007 transitions. [2023-11-06 22:46:18,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1007 transitions. [2023-11-06 22:46:18,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:18,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1007 transitions. [2023-11-06 22:46:18,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.83333333333334) internal successors, (1007), 6 states have internal predecessors, (1007), 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 22:46:18,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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 22:46:18,833 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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 22:46:18,833 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 159 flow. Second operand 6 states and 1007 transitions. [2023-11-06 22:46:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 236 flow [2023-11-06 22:46:18,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 232 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:46:18,840 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 80 flow [2023-11-06 22:46:18,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-11-06 22:46:18,845 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -10 predicate places. [2023-11-06 22:46:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 80 flow [2023-11-06 22:46:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 161.71428571428572) internal successors, (1132), 7 states have internal predecessors, (1132), 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 22:46:18,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:18,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:46:18,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:19,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:46:19,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1995683660, now seen corresponding path program 1 times [2023-11-06 22:46:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253361419] [2023-11-06 22:46:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:19,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:46:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:46:19,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:46:19,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:46:19,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:46:19,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:46:19,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:46:19,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:46:19,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:46:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:46:19,131 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:46:19,133 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:46:19,133 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:46:19,210 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:46:19,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,446 INFO L124 PetriNetUnfolderBase]: 99/753 cut-off events. [2023-11-06 22:46:19,447 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:46:19,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 753 events. 99/753 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3381 event pairs, 6 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-11-06 22:46:19,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:19,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,461 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 474 flow [2023-11-06 22:46:19,584 INFO L124 PetriNetUnfolderBase]: 99/753 cut-off events. [2023-11-06 22:46:19,584 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:46:19,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 753 events. 99/753 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3381 event pairs, 6 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-11-06 22:46:19,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 22264 [2023-11-06 22:46:25,335 INFO L134 LiptonReduction]: Checked pairs total: 38611 [2023-11-06 22:46:25,335 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-06 22:46:25,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:25,338 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;@a42a454, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:25,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:46:25,343 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:25,343 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2023-11-06 22:46:25,343 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:46:25,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:25,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:46:25,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash -659484860, now seen corresponding path program 1 times [2023-11-06 22:46:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:25,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882774438] [2023-11-06 22:46:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:25,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:25,417 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 22:46:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882774438] [2023-11-06 22:46:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882774438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:46:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710632303] [2023-11-06 22:46:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:25,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 417 [2023-11-06 22:46:25,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 22:46:25,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:25,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 417 [2023-11-06 22:46:25,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:47,289 INFO L124 PetriNetUnfolderBase]: 142106/197977 cut-off events. [2023-11-06 22:46:47,290 INFO L125 PetriNetUnfolderBase]: For 7004/7004 co-relation queries the response was YES. [2023-11-06 22:46:47,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393377 conditions, 197977 events. 142106/197977 cut-off events. For 7004/7004 co-relation queries the response was YES. Maximal size of possible extension queue 4947. Compared 1421451 event pairs, 67790 based on Foata normal form. 25358/195311 useless extension candidates. Maximal degree in co-relation 49895. Up to 102699 conditions per place. [2023-11-06 22:46:48,829 INFO L140 encePairwiseOnDemand]: 390/417 looper letters, 73 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-06 22:46:48,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 386 flow [2023-11-06 22:46:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-11-06 22:46:48,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267785771382894 [2023-11-06 22:46:48,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-11-06 22:46:48,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-11-06 22:46:48,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:48,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-11-06 22:46:48,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 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 22:46:48,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 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 22:46:48,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 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 22:46:48,847 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 180 flow. Second operand 3 states and 659 transitions. [2023-11-06 22:46:48,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 386 flow [2023-11-06 22:46:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 87 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:48,856 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 206 flow [2023-11-06 22:46:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2023-11-06 22:46:48,859 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-06 22:46:48,859 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 206 flow [2023-11-06 22:46:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 22:46:48,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:48,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:48,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:46:48,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:46:48,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash 644501564, now seen corresponding path program 1 times [2023-11-06 22:46:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:48,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262433996] [2023-11-06 22:46:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:48,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:48,959 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 22:46:48,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:48,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262433996] [2023-11-06 22:46:48,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262433996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:48,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12393931] [2023-11-06 22:46:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:48,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:48,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:48,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:46:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:49,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:46:49,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:49,130 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 22:46:49,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:49,159 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 22:46:49,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12393931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:49,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:46:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776606683] [2023-11-06 22:46:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:49,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 417 [2023-11-06 22:46:49,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 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 22:46:49,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:49,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 417 [2023-11-06 22:46:49,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:09,055 INFO L124 PetriNetUnfolderBase]: 131044/182007 cut-off events. [2023-11-06 22:47:09,056 INFO L125 PetriNetUnfolderBase]: For 64235/64235 co-relation queries the response was YES. [2023-11-06 22:47:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422878 conditions, 182007 events. 131044/182007 cut-off events. For 64235/64235 co-relation queries the response was YES. Maximal size of possible extension queue 4580. Compared 1285077 event pairs, 22304 based on Foata normal form. 0/169972 useless extension candidates. Maximal degree in co-relation 91833. Up to 168513 conditions per place. [2023-11-06 22:47:10,144 INFO L140 encePairwiseOnDemand]: 413/417 looper letters, 97 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2023-11-06 22:47:10,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 534 flow [2023-11-06 22:47:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:47:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:47:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-11-06 22:47:10,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464828137490008 [2023-11-06 22:47:10,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-11-06 22:47:10,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-11-06 22:47:10,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:10,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-11-06 22:47:10,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 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 22:47:10,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 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 22:47:10,165 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 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 22:47:10,165 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 206 flow. Second operand 6 states and 1163 transitions. [2023-11-06 22:47:10,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 534 flow [2023-11-06 22:47:10,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:47:10,390 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 234 flow [2023-11-06 22:47:10,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-11-06 22:47:10,391 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-11-06 22:47:10,391 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 234 flow [2023-11-06 22:47:10,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 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 22:47:10,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:10,393 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:10,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bd7afca-dfbd-4812-984c-6581672a4574/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:10,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:47:10,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1444831290, now seen corresponding path program 1 times [2023-11-06 22:47:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:10,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718250496] [2023-11-06 22:47:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:47:10,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:47:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:47:10,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:47:10,653 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:47:10,654 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:47:10,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:47:10,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:47:10,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:47:10,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:47:10,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:47:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:47:10,656 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:47:10,657 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:47:10,657 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-06 22:47:10,692 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-06 22:47:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:10,906 INFO L124 PetriNetUnfolderBase]: 161/1137 cut-off events. [2023-11-06 22:47:10,907 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:47:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 1137 events. 161/1137 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5709 event pairs, 23 based on Foata normal form. 0/987 useless extension candidates. Maximal degree in co-relation 798. Up to 80 conditions per place. [2023-11-06 22:47:10,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:10,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:10,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:47:10,934 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:10,934 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:10,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 537 flow [2023-11-06 22:47:11,434 INFO L124 PetriNetUnfolderBase]: 161/1137 cut-off events. [2023-11-06 22:47:11,434 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:47:11,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 1137 events. 161/1137 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5709 event pairs, 23 based on Foata normal form. 0/987 useless extension candidates. Maximal degree in co-relation 798. Up to 80 conditions per place. [2023-11-06 22:47:11,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 30580 [2023-11-06 22:47:16,738 INFO L134 LiptonReduction]: Checked pairs total: 54157 [2023-11-06 22:47:16,738 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-11-06 22:47:16,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:47:16,741 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;@a42a454, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:47:16,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:47:16,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:47:16,745 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:47:16,745 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:47:16,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:16,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:47:16,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:47:16,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash 866654438, now seen corresponding path program 1 times [2023-11-06 22:47:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781218798] [2023-11-06 22:47:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:16,808 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 22:47:16,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781218798] [2023-11-06 22:47:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781218798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:16,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331601539] [2023-11-06 22:47:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:16,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 462 [2023-11-06 22:47:16,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:16,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:16,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 462 [2023-11-06 22:47:16,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand