./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:32:47,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:32:47,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:32:47,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:32:47,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:32:47,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:32:47,746 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:32:47,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:32:47,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:32:47,753 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:32:47,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:32:47,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:32:47,755 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:32:47,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:32:47,757 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:32:47,758 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:32:47,758 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:32:47,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:32:47,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:32:47,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:32:47,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:32:47,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:32:47,762 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:32:47,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:32:47,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:32:47,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:32:47,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:32:47,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:32:47,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:32:47,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:32:47,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:32:47,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:32:47,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:32:47,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:32:47,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:32:47,769 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:32:47,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:32:47,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:32:47,769 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:32:47,770 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_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2023-11-19 07:32:48,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:32:48,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:32:48,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:32:48,087 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:32:48,088 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:32:48,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-19 07:32:51,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:32:51,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:32:51,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-19 07:32:51,495 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/data/0e51719d5/918e4015a6284df7ac304513646bfe98/FLAG6eb7b9371 [2023-11-19 07:32:51,514 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/data/0e51719d5/918e4015a6284df7ac304513646bfe98 [2023-11-19 07:32:51,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:32:51,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:32:51,529 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:32:51,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:32:51,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:32:51,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:51" (1/1) ... [2023-11-19 07:32:51,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791f4399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:51, skipping insertion in model container [2023-11-19 07:32:51,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:51" (1/1) ... [2023-11-19 07:32:51,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:32:52,094 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_0602f147-eb05-4d00-8ed3-d824d907db3b/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-19 07:32:52,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:32:52,124 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:32:52,188 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_0602f147-eb05-4d00-8ed3-d824d907db3b/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-19 07:32:52,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:32:52,246 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:32:52,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52 WrapperNode [2023-11-19 07:32:52,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:32:52,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:32:52,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:32:52,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:32:52,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,300 INFO L138 Inliner]: procedures = 162, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-11-19 07:32:52,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:32:52,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:32:52,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:32:52,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:32:52,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,351 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:32:52,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:32:52,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:32:52,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:32:52,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (1/1) ... [2023-11-19 07:32:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:32:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:32:52,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:32:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:32:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-19 07:32:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-19 07:32:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:32:52,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:32:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:32:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:32:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:32:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:32:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:32:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:32:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:32:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:32:52,451 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:32:52,626 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:32:52,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:32:52,765 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:32:52,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:32:52,777 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:32:52,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:52 BoogieIcfgContainer [2023-11-19 07:32:52,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:32:52,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:32:52,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:32:52,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:32:52,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:32:51" (1/3) ... [2023-11-19 07:32:52,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bdf80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:52, skipping insertion in model container [2023-11-19 07:32:52,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:52" (2/3) ... [2023-11-19 07:32:52,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bdf80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:52, skipping insertion in model container [2023-11-19 07:32:52,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:52" (3/3) ... [2023-11-19 07:32:52,795 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2023-11-19 07:32:52,804 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:32:52,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:32:52,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:32:52,813 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:32:52,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:32:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 146 flow [2023-11-19 07:32:52,974 INFO L124 PetriNetUnfolderBase]: 7/79 cut-off events. [2023-11-19 07:32:52,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:32:52,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 79 events. 7/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-11-19 07:32:52,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 146 flow [2023-11-19 07:32:52,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 68 transitions, 143 flow [2023-11-19 07:32:52,991 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:32:53,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 68 transitions, 143 flow [2023-11-19 07:32:53,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 68 transitions, 143 flow [2023-11-19 07:32:53,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 68 transitions, 143 flow [2023-11-19 07:32:53,058 INFO L124 PetriNetUnfolderBase]: 7/79 cut-off events. [2023-11-19 07:32:53,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:32:53,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 79 events. 7/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 124 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-11-19 07:32:53,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 1204 [2023-11-19 07:32:55,323 INFO L134 LiptonReduction]: Checked pairs total: 1830 [2023-11-19 07:32:55,323 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-19 07:32:55,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:32:55,351 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5327ab05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:32:55,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:32:55,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:32:55,359 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:32:55,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:32:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:32:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:32:55,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:32:55,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:32:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash 265589404, now seen corresponding path program 1 times [2023-11-19 07:32:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:32:55,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326499853] [2023-11-19 07:32:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:32:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:32:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:32:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:32:55,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:32:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326499853] [2023-11-19 07:32:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326499853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:32:55,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:32:55,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:32:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102950005] [2023-11-19 07:32:55,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:32:55,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:32:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:32:55,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:32:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:32:55,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 121 [2023-11-19 07:32:55,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:55,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:32:55,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 121 [2023-11-19 07:32:55,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:32:55,974 INFO L124 PetriNetUnfolderBase]: 120/224 cut-off events. [2023-11-19 07:32:55,975 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:32:55,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 224 events. 120/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 783 event pairs, 36 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 421. Up to 103 conditions per place. [2023-11-19 07:32:55,981 INFO L140 encePairwiseOnDemand]: 112/121 looper letters, 15 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2023-11-19 07:32:55,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 93 flow [2023-11-19 07:32:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:32:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:32:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-11-19 07:32:56,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-19 07:32:56,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-11-19 07:32:56,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-11-19 07:32:56,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:32:56,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-11-19 07:32:56,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:56,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:56,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:56,031 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 49 flow. Second operand 3 states and 187 transitions. [2023-11-19 07:32:56,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 93 flow [2023-11-19 07:32:56,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:32:56,037 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 70 flow [2023-11-19 07:32:56,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-19 07:32:56,044 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2023-11-19 07:32:56,044 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 70 flow [2023-11-19 07:32:56,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:56,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:32:56,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:32:56,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:32:56,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:32:56,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:32:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1388513362, now seen corresponding path program 1 times [2023-11-19 07:32:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:32:56,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917514974] [2023-11-19 07:32:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:32:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:32:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:32:56,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:32:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:32:56,165 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:32:56,165 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:32:56,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:32:56,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:32:56,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-19 07:32:56,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:32:56,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:32:56,173 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:32:56,177 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:32:56,177 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:32:56,219 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:32:56,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 98 transitions, 216 flow [2023-11-19 07:32:56,254 INFO L124 PetriNetUnfolderBase]: 10/106 cut-off events. [2023-11-19 07:32:56,254 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:32:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 106 events. 10/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-11-19 07:32:56,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 98 transitions, 216 flow [2023-11-19 07:32:56,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 82 transitions, 177 flow [2023-11-19 07:32:56,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:32:56,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 82 transitions, 177 flow [2023-11-19 07:32:56,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 82 transitions, 177 flow [2023-11-19 07:32:56,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 82 transitions, 177 flow [2023-11-19 07:32:56,281 INFO L124 PetriNetUnfolderBase]: 10/106 cut-off events. [2023-11-19 07:32:56,282 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:32:56,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 106 events. 10/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-11-19 07:32:56,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 2324 [2023-11-19 07:32:58,140 INFO L134 LiptonReduction]: Checked pairs total: 5542 [2023-11-19 07:32:58,140 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-19 07:32:58,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:32:58,144 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5327ab05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:32:58,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:32:58,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:32:58,147 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:32:58,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:32:58,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:32:58,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:32:58,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:32:58,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:32:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash 440982080, now seen corresponding path program 1 times [2023-11-19 07:32:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:32:58,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553071558] [2023-11-19 07:32:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:32:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:32:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:32:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:32:58,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:32:58,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553071558] [2023-11-19 07:32:58,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553071558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:32:58,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:32:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:32:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348327302] [2023-11-19 07:32:58,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:32:58,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:32:58,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:32:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:32:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:32:58,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 155 [2023-11-19 07:32:58,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:32:58,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 155 [2023-11-19 07:32:58,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:32:58,443 INFO L124 PetriNetUnfolderBase]: 901/1485 cut-off events. [2023-11-19 07:32:58,443 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-19 07:32:58,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1485 events. 901/1485 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8002 event pairs, 242 based on Foata normal form. 0/1412 useless extension candidates. Maximal degree in co-relation 2852. Up to 815 conditions per place. [2023-11-19 07:32:58,459 INFO L140 encePairwiseOnDemand]: 143/155 looper letters, 23 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-19 07:32:58,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 156 flow [2023-11-19 07:32:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:32:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:32:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-19 07:32:58,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2023-11-19 07:32:58,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-19 07:32:58,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-19 07:32:58,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:32:58,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-19 07:32:58,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,467 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 81 flow. Second operand 3 states and 250 transitions. [2023-11-19 07:32:58,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 156 flow [2023-11-19 07:32:58,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:32:58,469 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 114 flow [2023-11-19 07:32:58,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-19 07:32:58,470 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-19 07:32:58,471 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 114 flow [2023-11-19 07:32:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:32:58,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:32:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:32:58,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:32:58,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:32:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -274394349, now seen corresponding path program 1 times [2023-11-19 07:32:58,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:32:58,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484474421] [2023-11-19 07:32:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:32:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:32:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:32:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:32:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:32:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484474421] [2023-11-19 07:32:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484474421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:32:58,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:32:58,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:32:58,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891225424] [2023-11-19 07:32:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:32:58,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:32:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:32:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:32:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:32:58,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-19 07:32:58,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:32:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-19 07:32:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:32:58,702 INFO L124 PetriNetUnfolderBase]: 135/365 cut-off events. [2023-11-19 07:32:58,703 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-11-19 07:32:58,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 365 events. 135/365 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1822 event pairs, 15 based on Foata normal form. 181/544 useless extension candidates. Maximal degree in co-relation 792. Up to 206 conditions per place. [2023-11-19 07:32:58,707 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 15 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-11-19 07:32:58,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 160 flow [2023-11-19 07:32:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:32:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:32:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-11-19 07:32:58,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075268817204301 [2023-11-19 07:32:58,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-11-19 07:32:58,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-11-19 07:32:58,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:32:58,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-11-19 07:32:58,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,714 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 114 flow. Second operand 3 states and 236 transitions. [2023-11-19 07:32:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 160 flow [2023-11-19 07:32:58,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 148 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:32:58,717 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 102 flow [2023-11-19 07:32:58,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 07:32:58,719 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-19 07:32:58,719 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 102 flow [2023-11-19 07:32:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:32:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:32:58,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:32:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:32:58,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:32:58,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:32:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1415068506, now seen corresponding path program 1 times [2023-11-19 07:32:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:32:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463769250] [2023-11-19 07:32:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:32:58,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:32:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:32:58,738 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:32:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:32:58,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:32:58,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:32:58,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:32:58,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:32:58,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-19 07:32:58,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:32:58,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:32:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:32:58,756 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:32:58,757 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:32:58,757 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:32:58,780 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:32:58,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 290 flow [2023-11-19 07:32:58,799 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-11-19 07:32:58,800 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:32:58,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 133 events. 13/133 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 144. Up to 8 conditions per place. [2023-11-19 07:32:58,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 127 transitions, 290 flow [2023-11-19 07:32:58,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 96 transitions, 213 flow [2023-11-19 07:32:58,803 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:32:58,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 213 flow [2023-11-19 07:32:58,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 213 flow [2023-11-19 07:32:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 213 flow [2023-11-19 07:32:58,819 INFO L124 PetriNetUnfolderBase]: 13/133 cut-off events. [2023-11-19 07:32:58,819 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:32:58,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 133 events. 13/133 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 258 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 118. Up to 8 conditions per place. [2023-11-19 07:32:58,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 3808 [2023-11-19 07:33:00,531 INFO L134 LiptonReduction]: Checked pairs total: 10445 [2023-11-19 07:33:00,531 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-19 07:33:00,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:00,535 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5327ab05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:00,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:33:00,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:00,538 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:33:00,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:00,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:00,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:33:00,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:33:00,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash 647910807, now seen corresponding path program 1 times [2023-11-19 07:33:00,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:00,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417050578] [2023-11-19 07:33:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417050578] [2023-11-19 07:33:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417050578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204769136] [2023-11-19 07:33:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:00,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:00,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 188 [2023-11-19 07:33:00,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:00,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:00,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 188 [2023-11-19 07:33:00,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:01,449 INFO L124 PetriNetUnfolderBase]: 4647/7116 cut-off events. [2023-11-19 07:33:01,449 INFO L125 PetriNetUnfolderBase]: For 789/789 co-relation queries the response was YES. [2023-11-19 07:33:01,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13707 conditions, 7116 events. 4647/7116 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44544 event pairs, 993 based on Foata normal form. 244/6769 useless extension candidates. Maximal degree in co-relation 13695. Up to 5498 conditions per place. [2023-11-19 07:33:01,528 INFO L140 encePairwiseOnDemand]: 176/188 looper letters, 31 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-11-19 07:33:01,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 203 flow [2023-11-19 07:33:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-11-19 07:33:01,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2023-11-19 07:33:01,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-11-19 07:33:01,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-11-19 07:33:01,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:01,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-11-19 07:33:01,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,539 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 107 flow. Second operand 3 states and 318 transitions. [2023-11-19 07:33:01,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 203 flow [2023-11-19 07:33:01,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 198 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:01,542 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 120 flow [2023-11-19 07:33:01,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-19 07:33:01,543 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-11-19 07:33:01,544 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 120 flow [2023-11-19 07:33:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:01,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:33:01,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:33:01,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1709855145, now seen corresponding path program 1 times [2023-11-19 07:33:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467799765] [2023-11-19 07:33:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:01,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467799765] [2023-11-19 07:33:01,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467799765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:01,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:01,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044334327] [2023-11-19 07:33:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:01,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:01,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:01,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-11-19 07:33:01,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:01,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-11-19 07:33:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:01,765 INFO L124 PetriNetUnfolderBase]: 308/871 cut-off events. [2023-11-19 07:33:01,766 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-19 07:33:01,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 871 events. 308/871 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5457 event pairs, 49 based on Foata normal form. 574/1418 useless extension candidates. Maximal degree in co-relation 1771. Up to 444 conditions per place. [2023-11-19 07:33:01,773 INFO L140 encePairwiseOnDemand]: 180/188 looper letters, 17 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2023-11-19 07:33:01,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 193 flow [2023-11-19 07:33:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-11-19 07:33:01,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195035460992907 [2023-11-19 07:33:01,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-11-19 07:33:01,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-11-19 07:33:01,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:01,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-11-19 07:33:01,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,780 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 120 flow. Second operand 3 states and 293 transitions. [2023-11-19 07:33:01,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 193 flow [2023-11-19 07:33:01,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:01,783 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 132 flow [2023-11-19 07:33:01,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-19 07:33:01,784 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-11-19 07:33:01,785 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 132 flow [2023-11-19 07:33:01,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:01,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:33:01,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:33:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash -530055640, now seen corresponding path program 1 times [2023-11-19 07:33:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832609589] [2023-11-19 07:33:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:01,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832609589] [2023-11-19 07:33:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832609589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18664136] [2023-11-19 07:33:01,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:01,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 188 [2023-11-19 07:33:01,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:01,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 188 [2023-11-19 07:33:01,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:02,220 INFO L124 PetriNetUnfolderBase]: 645/1489 cut-off events. [2023-11-19 07:33:02,221 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-11-19 07:33:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3705 conditions, 1489 events. 645/1489 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10482 event pairs, 46 based on Foata normal form. 12/1476 useless extension candidates. Maximal degree in co-relation 3691. Up to 791 conditions per place. [2023-11-19 07:33:02,236 INFO L140 encePairwiseOnDemand]: 176/188 looper letters, 50 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2023-11-19 07:33:02,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 390 flow [2023-11-19 07:33:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:33:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:33:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 581 transitions. [2023-11-19 07:33:02,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150709219858156 [2023-11-19 07:33:02,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 581 transitions. [2023-11-19 07:33:02,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 581 transitions. [2023-11-19 07:33:02,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:02,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 581 transitions. [2023-11-19 07:33:02,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.83333333333333) internal successors, (581), 6 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,246 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,247 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 132 flow. Second operand 6 states and 581 transitions. [2023-11-19 07:33:02,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 390 flow [2023-11-19 07:33:02,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:02,251 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 214 flow [2023-11-19 07:33:02,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-19 07:33:02,252 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-11-19 07:33:02,252 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 214 flow [2023-11-19 07:33:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:02,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:33:02,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:33:02,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1334743035, now seen corresponding path program 1 times [2023-11-19 07:33:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044388934] [2023-11-19 07:33:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:02,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:02,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:33:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:02,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:33:02,286 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:33:02,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:33:02,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:33:02,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-19 07:33:02,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:33:02,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:33:02,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:33:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:33:02,287 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:33:02,288 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:33:02,288 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:33:02,317 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:33:02,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 156 transitions, 368 flow [2023-11-19 07:33:02,338 INFO L124 PetriNetUnfolderBase]: 16/160 cut-off events. [2023-11-19 07:33:02,338 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:33:02,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 160 events. 16/160 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 176. Up to 10 conditions per place. [2023-11-19 07:33:02,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 156 transitions, 368 flow [2023-11-19 07:33:02,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 110 transitions, 251 flow [2023-11-19 07:33:02,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:02,342 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 110 transitions, 251 flow [2023-11-19 07:33:02,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 110 transitions, 251 flow [2023-11-19 07:33:02,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 110 transitions, 251 flow [2023-11-19 07:33:02,360 INFO L124 PetriNetUnfolderBase]: 16/160 cut-off events. [2023-11-19 07:33:02,360 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:33:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 160 events. 16/160 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 327 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 150. Up to 10 conditions per place. [2023-11-19 07:33:02,368 INFO L119 LiptonReduction]: Number of co-enabled transitions 5656 [2023-11-19 07:33:04,115 INFO L134 LiptonReduction]: Checked pairs total: 17816 [2023-11-19 07:33:04,115 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-19 07:33:04,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:04,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5327ab05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:04,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:33:04,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:04,128 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:33:04,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:04,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:04,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:33:04,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:33:04,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash 888193669, now seen corresponding path program 1 times [2023-11-19 07:33:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:04,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195027839] [2023-11-19 07:33:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195027839] [2023-11-19 07:33:04,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195027839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:04,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:04,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:04,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023441590] [2023-11-19 07:33:04,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:04,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:04,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 223 [2023-11-19 07:33:04,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:04,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:04,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 223 [2023-11-19 07:33:04,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:10,164 INFO L124 PetriNetUnfolderBase]: 36883/52097 cut-off events. [2023-11-19 07:33:10,164 INFO L125 PetriNetUnfolderBase]: For 8327/8327 co-relation queries the response was YES. [2023-11-19 07:33:10,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101664 conditions, 52097 events. 36883/52097 cut-off events. For 8327/8327 co-relation queries the response was YES. Maximal size of possible extension queue 2244. Compared 362444 event pairs, 7724 based on Foata normal form. 1552/49522 useless extension candidates. Maximal degree in co-relation 101651. Up to 42453 conditions per place. [2023-11-19 07:33:10,597 INFO L140 encePairwiseOnDemand]: 209/223 looper letters, 41 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2023-11-19 07:33:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 270 flow [2023-11-19 07:33:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-11-19 07:33:10,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844544095665172 [2023-11-19 07:33:10,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-11-19 07:33:10,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-11-19 07:33:10,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:10,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-11-19 07:33:10,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:10,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:10,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:10,607 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 135 flow. Second operand 3 states and 391 transitions. [2023-11-19 07:33:10,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 270 flow [2023-11-19 07:33:10,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 257 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:10,616 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 149 flow [2023-11-19 07:33:10,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=149, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-11-19 07:33:10,619 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-11-19 07:33:10,619 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 149 flow [2023-11-19 07:33:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:10,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:10,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:33:10,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:33:10,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1092937415, now seen corresponding path program 1 times [2023-11-19 07:33:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333476424] [2023-11-19 07:33:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:10,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:10,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333476424] [2023-11-19 07:33:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333476424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:10,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:10,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000467255] [2023-11-19 07:33:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:10,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 223 [2023-11-19 07:33:10,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:10,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 223 [2023-11-19 07:33:10,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:11,099 INFO L124 PetriNetUnfolderBase]: 794/2141 cut-off events. [2023-11-19 07:33:11,099 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2023-11-19 07:33:11,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 2141 events. 794/2141 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15928 event pairs, 118 based on Foata normal form. 2044/4126 useless extension candidates. Maximal degree in co-relation 4463. Up to 1173 conditions per place. [2023-11-19 07:33:11,112 INFO L140 encePairwiseOnDemand]: 213/223 looper letters, 21 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-11-19 07:33:11,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 241 flow [2023-11-19 07:33:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-11-19 07:33:11,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246636771300448 [2023-11-19 07:33:11,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-11-19 07:33:11,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-11-19 07:33:11,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:11,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-11-19 07:33:11,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,119 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 149 flow. Second operand 3 states and 351 transitions. [2023-11-19 07:33:11,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 241 flow [2023-11-19 07:33:11,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:11,123 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 164 flow [2023-11-19 07:33:11,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-19 07:33:11,125 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-19 07:33:11,126 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 164 flow [2023-11-19 07:33:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:11,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:11,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:33:11,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:33:11,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash -640490350, now seen corresponding path program 1 times [2023-11-19 07:33:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:11,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665181321] [2023-11-19 07:33:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:11,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:11,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665181321] [2023-11-19 07:33:11,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665181321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:11,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:11,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:11,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689425085] [2023-11-19 07:33:11,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:11,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 223 [2023-11-19 07:33:11,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:11,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 223 [2023-11-19 07:33:11,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:11,903 INFO L124 PetriNetUnfolderBase]: 1719/3712 cut-off events. [2023-11-19 07:33:11,903 INFO L125 PetriNetUnfolderBase]: For 1677/1677 co-relation queries the response was YES. [2023-11-19 07:33:11,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9488 conditions, 3712 events. 1719/3712 cut-off events. For 1677/1677 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 29181 event pairs, 120 based on Foata normal form. 20/3671 useless extension candidates. Maximal degree in co-relation 9473. Up to 2325 conditions per place. [2023-11-19 07:33:11,934 INFO L140 encePairwiseOnDemand]: 208/223 looper letters, 67 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-11-19 07:33:11,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 485 flow [2023-11-19 07:33:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:33:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:33:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 597 transitions. [2023-11-19 07:33:11,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354260089686098 [2023-11-19 07:33:11,937 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 597 transitions. [2023-11-19 07:33:11,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 597 transitions. [2023-11-19 07:33:11,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:11,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 597 transitions. [2023-11-19 07:33:11,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,944 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,944 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 164 flow. Second operand 5 states and 597 transitions. [2023-11-19 07:33:11,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 485 flow [2023-11-19 07:33:11,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:11,950 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 261 flow [2023-11-19 07:33:11,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-11-19 07:33:11,951 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-19 07:33:11,952 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 261 flow [2023-11-19 07:33:11,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:11,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:11,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:33:11,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:33:11,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash 751790658, now seen corresponding path program 2 times [2023-11-19 07:33:11,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070646972] [2023-11-19 07:33:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070646972] [2023-11-19 07:33:12,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070646972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750571996] [2023-11-19 07:33:12,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:33:12,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:12,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:12,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:12,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:33:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:33:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:33:12,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:33:12,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:12,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750571996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:33:12,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:33:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-19 07:33:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645133367] [2023-11-19 07:33:12,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:33:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:33:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:33:12,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 223 [2023-11-19 07:33:12,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 261 flow. Second operand has 19 states, 19 states have (on average 96.6842105263158) internal successors, (1837), 19 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:12,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:12,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 223 [2023-11-19 07:33:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:14,300 INFO L124 PetriNetUnfolderBase]: 3024/6321 cut-off events. [2023-11-19 07:33:14,300 INFO L125 PetriNetUnfolderBase]: For 3576/3576 co-relation queries the response was YES. [2023-11-19 07:33:14,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16927 conditions, 6321 events. 3024/6321 cut-off events. For 3576/3576 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 54468 event pairs, 52 based on Foata normal form. 92/6358 useless extension candidates. Maximal degree in co-relation 16907. Up to 2304 conditions per place. [2023-11-19 07:33:14,355 INFO L140 encePairwiseOnDemand]: 203/223 looper letters, 106 selfloop transitions, 54 changer transitions 0/173 dead transitions. [2023-11-19 07:33:14,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 173 transitions, 1076 flow [2023-11-19 07:33:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:33:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:33:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1574 transitions. [2023-11-19 07:33:14,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47055306427503735 [2023-11-19 07:33:14,364 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1574 transitions. [2023-11-19 07:33:14,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1574 transitions. [2023-11-19 07:33:14,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:14,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1574 transitions. [2023-11-19 07:33:14,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 104.93333333333334) internal successors, (1574), 15 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:14,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 223.0) internal successors, (3568), 16 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:14,383 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 223.0) internal successors, (3568), 16 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:14,383 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 261 flow. Second operand 15 states and 1574 transitions. [2023-11-19 07:33:14,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 173 transitions, 1076 flow [2023-11-19 07:33:14,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 173 transitions, 1063 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:14,397 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 555 flow [2023-11-19 07:33:14,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=555, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2023-11-19 07:33:14,399 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2023-11-19 07:33:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 555 flow [2023-11-19 07:33:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 96.6842105263158) internal successors, (1837), 19 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:14,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:14,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:33:14,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:33:14,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:33:14,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 966602701, now seen corresponding path program 1 times [2023-11-19 07:33:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:14,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509917280] [2023-11-19 07:33:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:14,656 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:33:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:33:14,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:33:14,681 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:33:14,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:33:14,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 07:33:14,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-19 07:33:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 07:33:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 07:33:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 07:33:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 07:33:14,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:33:14,683 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-19 07:33:14,684 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:33:14,684 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 07:33:14,730 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:33:14,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 185 transitions, 450 flow [2023-11-19 07:33:14,767 INFO L124 PetriNetUnfolderBase]: 19/187 cut-off events. [2023-11-19 07:33:14,768 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:33:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 187 events. 19/187 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 391 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 209. Up to 12 conditions per place. [2023-11-19 07:33:14,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 185 transitions, 450 flow [2023-11-19 07:33:14,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 124 transitions, 291 flow [2023-11-19 07:33:14,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:14,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 124 transitions, 291 flow [2023-11-19 07:33:14,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 124 transitions, 291 flow [2023-11-19 07:33:14,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 124 transitions, 291 flow [2023-11-19 07:33:14,799 INFO L124 PetriNetUnfolderBase]: 19/187 cut-off events. [2023-11-19 07:33:14,800 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:33:14,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 187 events. 19/187 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 391 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 183. Up to 12 conditions per place. [2023-11-19 07:33:14,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 7868 [2023-11-19 07:33:16,778 INFO L134 LiptonReduction]: Checked pairs total: 24674 [2023-11-19 07:33:16,778 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-11-19 07:33:16,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:16,781 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5327ab05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:16,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:33:16,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:33:16,784 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-19 07:33:16,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:16,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:16,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:33:16,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-19 07:33:16,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1163683138, now seen corresponding path program 1 times [2023-11-19 07:33:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:16,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650850222] [2023-11-19 07:33:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:16,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:16,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650850222] [2023-11-19 07:33:16,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650850222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:16,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:16,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:33:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812723295] [2023-11-19 07:33:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:16,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 260 [2023-11-19 07:33:16,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:16,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:16,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 260 [2023-11-19 07:33:16,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:31,414 INFO L124 PetriNetUnfolderBase]: 111890/152641 cut-off events. [2023-11-19 07:33:31,415 INFO L125 PetriNetUnfolderBase]: For 30397/30397 co-relation queries the response was YES. [2023-11-19 07:33:31,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297814 conditions, 152641 events. 111890/152641 cut-off events. For 30397/30397 co-relation queries the response was YES. Maximal size of possible extension queue 5344. Compared 1093248 event pairs, 23645 based on Foata normal form. 0/144427 useless extension candidates. Maximal degree in co-relation 297800. Up to 128595 conditions per place. [2023-11-19 07:33:32,727 INFO L140 encePairwiseOnDemand]: 246/260 looper letters, 44 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2023-11-19 07:33:32,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 319 flow [2023-11-19 07:33:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-11-19 07:33:32,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756410256410256 [2023-11-19 07:33:32,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-11-19 07:33:32,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-11-19 07:33:32,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:32,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-11-19 07:33:32,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:32,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:32,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:32,736 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 161 flow. Second operand 3 states and 449 transitions. [2023-11-19 07:33:32,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 319 flow [2023-11-19 07:33:32,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 294 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:32,750 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 174 flow [2023-11-19 07:33:32,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-19 07:33:32,751 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2023-11-19 07:33:32,752 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 174 flow [2023-11-19 07:33:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:32,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:32,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:32,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:33:32,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-19 07:33:32,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 644704629, now seen corresponding path program 1 times [2023-11-19 07:33:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:32,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86835442] [2023-11-19 07:33:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:32,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:32,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:32,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86835442] [2023-11-19 07:33:32,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86835442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:32,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511857000] [2023-11-19 07:33:32,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:33:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:33:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:33:32,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 260 [2023-11-19 07:33:32,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:32,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:32,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 260 [2023-11-19 07:33:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:33,365 INFO L124 PetriNetUnfolderBase]: 1625/4646 cut-off events. [2023-11-19 07:33:33,366 INFO L125 PetriNetUnfolderBase]: For 1193/1193 co-relation queries the response was YES. [2023-11-19 07:33:33,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9059 conditions, 4646 events. 1625/4646 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 40054 event pairs, 287 based on Foata normal form. 4528/9141 useless extension candidates. Maximal degree in co-relation 9043. Up to 2139 conditions per place. [2023-11-19 07:33:33,392 INFO L140 encePairwiseOnDemand]: 248/260 looper letters, 21 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-11-19 07:33:33,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 277 flow [2023-11-19 07:33:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:33:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:33:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-11-19 07:33:33,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2023-11-19 07:33:33,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-11-19 07:33:33,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-11-19 07:33:33,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:33,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-11-19 07:33:33,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:33,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:33,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:33,401 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 174 flow. Second operand 3 states and 405 transitions. [2023-11-19 07:33:33,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 277 flow [2023-11-19 07:33:33,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:33,405 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 192 flow [2023-11-19 07:33:33,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-19 07:33:33,406 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-11-19 07:33:33,406 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 192 flow [2023-11-19 07:33:33,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:33,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:33,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:33,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:33:33,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-19 07:33:33,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 668350661, now seen corresponding path program 1 times [2023-11-19 07:33:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076302427] [2023-11-19 07:33:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:33,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076302427] [2023-11-19 07:33:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076302427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:33,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:33,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:33:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384453884] [2023-11-19 07:33:33,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:33,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:33:33,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:33:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:33:33,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 260 [2023-11-19 07:33:33,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:33,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:33,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 260 [2023-11-19 07:33:33,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:33:34,602 INFO L124 PetriNetUnfolderBase]: 4203/8799 cut-off events. [2023-11-19 07:33:34,602 INFO L125 PetriNetUnfolderBase]: For 4454/4454 co-relation queries the response was YES. [2023-11-19 07:33:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22363 conditions, 8799 events. 4203/8799 cut-off events. For 4454/4454 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 76527 event pairs, 124 based on Foata normal form. 114/8910 useless extension candidates. Maximal degree in co-relation 22347. Up to 5269 conditions per place. [2023-11-19 07:33:34,654 INFO L140 encePairwiseOnDemand]: 242/260 looper letters, 73 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2023-11-19 07:33:34,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 112 transitions, 606 flow [2023-11-19 07:33:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:33:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:33:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 786 transitions. [2023-11-19 07:33:34,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2023-11-19 07:33:34,658 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 786 transitions. [2023-11-19 07:33:34,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 786 transitions. [2023-11-19 07:33:34,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:33:34,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 786 transitions. [2023-11-19 07:33:34,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:34,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 260.0) internal successors, (1820), 7 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:34,666 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 260.0) internal successors, (1820), 7 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:34,666 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 192 flow. Second operand 6 states and 786 transitions. [2023-11-19 07:33:34,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 112 transitions, 606 flow [2023-11-19 07:33:34,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:33:34,678 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 338 flow [2023-11-19 07:33:34,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-11-19 07:33:34,679 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-11-19 07:33:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 338 flow [2023-11-19 07:33:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:34,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:33:34,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:34,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:33:34,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-19 07:33:34,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -632174098, now seen corresponding path program 2 times [2023-11-19 07:33:34,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:34,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286568064] [2023-11-19 07:33:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:34,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286568064] [2023-11-19 07:33:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286568064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791132560] [2023-11-19 07:33:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:33:34,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:34,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:34,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0602f147-eb05-4d00-8ed3-d824d907db3b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:33:34,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:33:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:33:34,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:33:34,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:35,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:33:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791132560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:33:35,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:33:35,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-19 07:33:35,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251858939] [2023-11-19 07:33:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:33:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:33:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:33:35,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 260 [2023-11-19 07:33:35,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 111.55) internal successors, (2231), 20 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:33:35,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:33:35,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 260 [2023-11-19 07:33:35,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand