./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.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_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/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_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/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_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:46,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:46,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:46,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:46,914 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:46,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:46,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:46,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:46,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:46,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:46,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:46,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:46,964 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:46,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:46,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:46,967 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:46,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:46,968 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:46,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:46,969 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:46,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:46,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:46,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:46,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:46,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:46,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:46,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:46,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:46,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:46,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:46,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:46,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:46,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:46,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:46,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:46,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:46,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:46,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:46,977 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:46,977 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_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2023-11-19 07:40:47,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:47,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:47,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:47,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:47,351 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:47,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-11-19 07:40:50,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:51,005 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:51,005 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-11-19 07:40:51,025 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/data/af5514e3f/21a57f76e3fa47a585e87b08878dfcda/FLAGc19afd58b [2023-11-19 07:40:51,042 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/data/af5514e3f/21a57f76e3fa47a585e87b08878dfcda [2023-11-19 07:40:51,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:51,051 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:51,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:51,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:51,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:51,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:51" (1/1) ... [2023-11-19 07:40:51,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec19aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:51, skipping insertion in model container [2023-11-19 07:40:51,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:51" (1/1) ... [2023-11-19 07:40:51,148 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:51,860 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_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2023-11-19 07:40:51,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:51,921 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:51,965 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2023-11-19 07:40:51,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:52,118 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:52,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52 WrapperNode [2023-11-19 07:40:52,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:52,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:52,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:52,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:52,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,238 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 252 [2023-11-19 07:40:52,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:52,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:52,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:52,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:52,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:52,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:52,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:52,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:52,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (1/1) ... [2023-11-19 07:40:52,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:52,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:52,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:40:52,410 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:52,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:52,413 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 07:40:52,668 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:52,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:53,106 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:53,119 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:53,120 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-19 07:40:53,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:53 BoogieIcfgContainer [2023-11-19 07:40:53,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:53,129 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:53,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:53,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:53,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:51" (1/3) ... [2023-11-19 07:40:53,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6089fa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:53, skipping insertion in model container [2023-11-19 07:40:53,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:52" (2/3) ... [2023-11-19 07:40:53,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6089fa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:53, skipping insertion in model container [2023-11-19 07:40:53,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:53" (3/3) ... [2023-11-19 07:40:53,137 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-11-19 07:40:53,148 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:40:53,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:53,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-19 07:40:53,161 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:53,293 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:40:53,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 257 transitions, 521 flow [2023-11-19 07:40:53,505 INFO L124 PetriNetUnfolderBase]: 73/400 cut-off events. [2023-11-19 07:40:53,505 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:40:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 400 events. 73/400 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1832 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-19 07:40:53,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 257 transitions, 521 flow [2023-11-19 07:40:53,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 252 transitions, 508 flow [2023-11-19 07:40:53,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:53,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-19 07:40:53,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-19 07:40:53,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 252 transitions, 508 flow [2023-11-19 07:40:53,650 INFO L124 PetriNetUnfolderBase]: 72/395 cut-off events. [2023-11-19 07:40:53,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:53,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 395 events. 72/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1795 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-19 07:40:53,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 21456 [2023-11-19 07:40:57,381 INFO L134 LiptonReduction]: Checked pairs total: 30710 [2023-11-19 07:40:57,382 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-19 07:40:57,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:57,406 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;@78a3484, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:57,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:40:57,413 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:57,413 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-11-19 07:40:57,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:57,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:57,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:57,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:57,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1072479972, now seen corresponding path program 1 times [2023-11-19 07:40:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:57,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621920463] [2023-11-19 07:40:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:57,740 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 07:40:57,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:57,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621920463] [2023-11-19 07:40:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621920463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:57,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:57,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486221848] [2023-11-19 07:40:57,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:57,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:57,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 455 [2023-11-19 07:40:57,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 97 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 07:40:57,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:57,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 455 [2023-11-19 07:40:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:58,130 INFO L124 PetriNetUnfolderBase]: 631/1296 cut-off events. [2023-11-19 07:40:58,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:58,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 1296 events. 631/1296 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7084 event pairs, 512 based on Foata normal form. 172/1245 useless extension candidates. Maximal degree in co-relation 2373. Up to 1159 conditions per place. [2023-11-19 07:40:58,142 INFO L140 encePairwiseOnDemand]: 420/455 looper letters, 53 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 07:40:58,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 246 flow [2023-11-19 07:40:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-11-19 07:40:58,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216117216117216 [2023-11-19 07:40:58,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-11-19 07:40:58,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-11-19 07:40:58,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:58,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-11-19 07:40:58,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 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 07:40:58,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 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 07:40:58,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 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 07:40:58,191 INFO L175 Difference]: Start difference. First operand has 63 places, 97 transitions, 198 flow. Second operand 3 states and 712 transitions. [2023-11-19 07:40:58,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 246 flow [2023-11-19 07:40:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:58,198 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 146 flow [2023-11-19 07:40:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-19 07:40:58,204 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-19 07:40:58,204 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 146 flow [2023-11-19 07:40:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 07:40:58,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:58,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:58,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:58,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1012587014, now seen corresponding path program 1 times [2023-11-19 07:40:58,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:58,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96801698] [2023-11-19 07:40:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:58,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:58,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96801698] [2023-11-19 07:40:58,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96801698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977837744] [2023-11-19 07:40:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:58,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:58,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:58,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:58,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:58,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:40:58,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:58,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977837744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:58,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-19 07:40:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778525611] [2023-11-19 07:40:58,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:58,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-19 07:40:58,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 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 07:40:58,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:58,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-19 07:40:58,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:58,859 INFO L124 PetriNetUnfolderBase]: 631/1299 cut-off events. [2023-11-19 07:40:58,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:58,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1299 events. 631/1299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7099 event pairs, 512 based on Foata normal form. 0/1076 useless extension candidates. Maximal degree in co-relation 2464. Up to 1159 conditions per place. [2023-11-19 07:40:58,871 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-19 07:40:58,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 274 flow [2023-11-19 07:40:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:40:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1303 transitions. [2023-11-19 07:40:58,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772893772893773 [2023-11-19 07:40:58,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1303 transitions. [2023-11-19 07:40:58,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1303 transitions. [2023-11-19 07:40:58,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:58,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1303 transitions. [2023-11-19 07:40:58,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 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 07:40:58,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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 07:40:58,909 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 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 07:40:58,909 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 146 flow. Second operand 6 states and 1303 transitions. [2023-11-19 07:40:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 274 flow [2023-11-19 07:40:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:58,915 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 178 flow [2023-11-19 07:40:58,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-11-19 07:40:58,916 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-11-19 07:40:58,917 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 178 flow [2023-11-19 07:40:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 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 07:40:58,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:58,918 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:40:58,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:59,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:59,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:40:59,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1489452960, now seen corresponding path program 2 times [2023-11-19 07:40:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371078377] [2023-11-19 07:40:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371078377] [2023-11-19 07:40:59,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371078377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:59,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955028163] [2023-11-19 07:40:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:59,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:59,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:59,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:59,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:59,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:59,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:59,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955028163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:59,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:59,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 07:40:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391758398] [2023-11-19 07:40:59,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:59,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:40:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:40:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:59,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-19 07:40:59,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 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 07:40:59,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:59,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-19 07:40:59,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:59,976 INFO L124 PetriNetUnfolderBase]: 631/1305 cut-off events. [2023-11-19 07:40:59,976 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:40:59,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1305 events. 631/1305 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7102 event pairs, 512 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 2455. Up to 1159 conditions per place. [2023-11-19 07:40:59,985 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-19 07:40:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 342 flow [2023-11-19 07:40:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:40:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:40:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2554 transitions. [2023-11-19 07:40:59,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776556776556777 [2023-11-19 07:40:59,996 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2554 transitions. [2023-11-19 07:40:59,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2554 transitions. [2023-11-19 07:40:59,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:59,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2554 transitions. [2023-11-19 07:41:00,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.83333333333334) internal successors, (2554), 12 states have internal predecessors, (2554), 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 07:41:00,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 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 07:41:00,025 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 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 07:41:00,025 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 178 flow. Second operand 12 states and 2554 transitions. [2023-11-19 07:41:00,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 342 flow [2023-11-19 07:41:00,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:00,029 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 248 flow [2023-11-19 07:41:00,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-11-19 07:41:00,030 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-19 07:41:00,030 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 248 flow [2023-11-19 07:41:00,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 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 07:41:00,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:00,033 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-19 07:41:00,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:00,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:41:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1597783712, now seen corresponding path program 3 times [2023-11-19 07:41:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:00,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000784555] [2023-11-19 07:41:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:00,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:00,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:00,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:41:00,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:41:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:41:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:41:00,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:41:00,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:41:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:00,377 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-19 07:41:00,380 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:41:00,380 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:41:00,435 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:41:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,552 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-19 07:41:00,552 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:41:00,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-19 07:41:00,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,572 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:00,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 07:41:00,682 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-19 07:41:00,682 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:41:00,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-19 07:41:00,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 54864 [2023-11-19 07:41:05,065 INFO L134 LiptonReduction]: Checked pairs total: 82244 [2023-11-19 07:41:05,066 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-19 07:41:05,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:05,080 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;@78a3484, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:05,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:41:05,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:05,090 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2023-11-19 07:41:05,090 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:41:05,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:05,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:05,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash -135104241, now seen corresponding path program 1 times [2023-11-19 07:41:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940728308] [2023-11-19 07:41:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:05,169 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 07:41:05,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:05,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940728308] [2023-11-19 07:41:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940728308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:05,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:05,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783291037] [2023-11-19 07:41:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:05,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:05,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-19 07:41:05,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 133 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 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 07:41:05,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:05,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-19 07:41:05,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:09,230 INFO L124 PetriNetUnfolderBase]: 20523/31523 cut-off events. [2023-11-19 07:41:09,231 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 07:41:09,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60685 conditions, 31523 events. 20523/31523 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 217735 event pairs, 17692 based on Foata normal form. 5278/31061 useless extension candidates. Maximal degree in co-relation 20767. Up to 29073 conditions per place. [2023-11-19 07:41:09,517 INFO L140 encePairwiseOnDemand]: 546/590 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-19 07:41:09,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-11-19 07:41:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 919 transitions. [2023-11-19 07:41:09,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192090395480226 [2023-11-19 07:41:09,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 919 transitions. [2023-11-19 07:41:09,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 919 transitions. [2023-11-19 07:41:09,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:09,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 919 transitions. [2023-11-19 07:41:09,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 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 07:41:09,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 07:41:09,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 07:41:09,532 INFO L175 Difference]: Start difference. First operand has 87 places, 133 transitions, 282 flow. Second operand 3 states and 919 transitions. [2023-11-19 07:41:09,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-11-19 07:41:09,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:09,539 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 212 flow [2023-11-19 07:41:09,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-11-19 07:41:09,540 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-11-19 07:41:09,540 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 212 flow [2023-11-19 07:41:09,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 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 07:41:09,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:09,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:09,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:41:09,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:09,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash -782341076, now seen corresponding path program 1 times [2023-11-19 07:41:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20178651] [2023-11-19 07:41:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:09,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20178651] [2023-11-19 07:41:09,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20178651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111883212] [2023-11-19 07:41:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:09,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:09,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:09,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:09,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:09,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:09,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:09,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111883212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:09,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:41:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430257657] [2023-11-19 07:41:09,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:09,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:09,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:09,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:09,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-19 07:41:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 07:41:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-19 07:41:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:13,022 INFO L124 PetriNetUnfolderBase]: 20188/31066 cut-off events. [2023-11-19 07:41:13,022 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-19 07:41:13,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60205 conditions, 31066 events. 20188/31066 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 217750 event pairs, 8512 based on Foata normal form. 0/25355 useless extension candidates. Maximal degree in co-relation 60192. Up to 29025 conditions per place. [2023-11-19 07:41:13,279 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 92 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-19 07:41:13,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-11-19 07:41:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2023-11-19 07:41:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056497175141242 [2023-11-19 07:41:13,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2023-11-19 07:41:13,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2023-11-19 07:41:13,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:13,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2023-11-19 07:41:13,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 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 07:41:13,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 07:41:13,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 07:41:13,294 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 212 flow. Second operand 3 states and 895 transitions. [2023-11-19 07:41:13,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-11-19 07:41:13,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:13,302 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 220 flow [2023-11-19 07:41:13,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-19 07:41:13,307 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-19 07:41:13,307 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 220 flow [2023-11-19 07:41:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 07:41:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:13,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:13,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:41:13,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:41:13,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:13,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1270546198, now seen corresponding path program 1 times [2023-11-19 07:41:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971135020] [2023-11-19 07:41:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971135020] [2023-11-19 07:41:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971135020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143850583] [2023-11-19 07:41:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:13,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:13,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:41:13,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:13,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143850583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:13,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:13,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:41:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498246589] [2023-11-19 07:41:13,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:13,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:13,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 590 [2023-11-19 07:41:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 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 07:41:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 590 [2023-11-19 07:41:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:17,125 INFO L124 PetriNetUnfolderBase]: 20639/31398 cut-off events. [2023-11-19 07:41:17,125 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-11-19 07:41:17,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61135 conditions, 31398 events. 20639/31398 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 213862 event pairs, 17692 based on Foata normal form. 3/25875 useless extension candidates. Maximal degree in co-relation 61107. Up to 29043 conditions per place. [2023-11-19 07:41:17,470 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 75 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-19 07:41:17,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-11-19 07:41:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:41:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1678 transitions. [2023-11-19 07:41:17,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47401129943502823 [2023-11-19 07:41:17,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1678 transitions. [2023-11-19 07:41:17,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1678 transitions. [2023-11-19 07:41:17,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:17,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1678 transitions. [2023-11-19 07:41:17,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.6666666666667) internal successors, (1678), 6 states have internal predecessors, (1678), 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 07:41:17,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 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 07:41:17,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 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 07:41:17,495 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 220 flow. Second operand 6 states and 1678 transitions. [2023-11-19 07:41:17,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-11-19 07:41:17,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:17,498 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 254 flow [2023-11-19 07:41:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-11-19 07:41:17,501 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-11-19 07:41:17,501 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 254 flow [2023-11-19 07:41:17,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 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 07:41:17,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:17,503 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:17,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:41:17,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1062321178, now seen corresponding path program 2 times [2023-11-19 07:41:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:17,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852405132] [2023-11-19 07:41:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852405132] [2023-11-19 07:41:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852405132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992576720] [2023-11-19 07:41:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:17,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:17,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:41:18,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:41:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:18,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:41:18,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:18,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-19 07:41:18,153 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:18,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:41:18,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-19 07:41:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:18,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992576720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:18,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:18,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-19 07:41:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856888344] [2023-11-19 07:41:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:18,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:41:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:41:18,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 590 [2023-11-19 07:41:18,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 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 07:41:18,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:18,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 590 [2023-11-19 07:41:18,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:22,781 INFO L124 PetriNetUnfolderBase]: 25160/39446 cut-off events. [2023-11-19 07:41:22,782 INFO L125 PetriNetUnfolderBase]: For 934/934 co-relation queries the response was YES. [2023-11-19 07:41:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 39446 events. 25160/39446 cut-off events. For 934/934 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 292468 event pairs, 4271 based on Foata normal form. 0/32714 useless extension candidates. Maximal degree in co-relation 76905. Up to 28726 conditions per place. [2023-11-19 07:41:23,029 INFO L140 encePairwiseOnDemand]: 579/590 looper letters, 189 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2023-11-19 07:41:23,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 224 transitions, 953 flow [2023-11-19 07:41:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:41:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2023-11-19 07:41:23,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488135593220339 [2023-11-19 07:41:23,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2023-11-19 07:41:23,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2023-11-19 07:41:23,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:23,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2023-11-19 07:41:23,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 07:41:23,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 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 07:41:23,056 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 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 07:41:23,056 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 254 flow. Second operand 6 states and 1728 transitions. [2023-11-19 07:41:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 224 transitions, 953 flow [2023-11-19 07:41:23,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 939 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:23,065 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 349 flow [2023-11-19 07:41:23,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-19 07:41:23,067 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-11-19 07:41:23,067 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 349 flow [2023-11-19 07:41:23,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 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 07:41:23,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:23,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:23,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:23,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:41:23,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:23,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1035874814, now seen corresponding path program 1 times [2023-11-19 07:41:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284586579] [2023-11-19 07:41:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:23,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:23,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:23,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284586579] [2023-11-19 07:41:23,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284586579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:23,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782331565] [2023-11-19 07:41:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:23,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:23,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:23,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:23,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:41:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:23,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:23,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:23,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782331565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:23,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:23,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-19 07:41:23,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771787505] [2023-11-19 07:41:23,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:23,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:41:23,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:41:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:41:23,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 590 [2023-11-19 07:41:23,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 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 07:41:23,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:23,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 590 [2023-11-19 07:41:23,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:28,344 INFO L124 PetriNetUnfolderBase]: 25222/39388 cut-off events. [2023-11-19 07:41:28,344 INFO L125 PetriNetUnfolderBase]: For 7584/7586 co-relation queries the response was YES. [2023-11-19 07:41:28,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84847 conditions, 39388 events. 25222/39388 cut-off events. For 7584/7586 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 294413 event pairs, 642 based on Foata normal form. 30/34792 useless extension candidates. Maximal degree in co-relation 84789. Up to 35697 conditions per place. [2023-11-19 07:41:28,701 INFO L140 encePairwiseOnDemand]: 585/590 looper letters, 147 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2023-11-19 07:41:28,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 875 flow [2023-11-19 07:41:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:41:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3812 transitions. [2023-11-19 07:41:28,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46150121065375305 [2023-11-19 07:41:28,728 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3812 transitions. [2023-11-19 07:41:28,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3812 transitions. [2023-11-19 07:41:28,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:28,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3812 transitions. [2023-11-19 07:41:28,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.2857142857143) internal successors, (3812), 14 states have internal predecessors, (3812), 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 07:41:28,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 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 07:41:28,791 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 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 07:41:28,792 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 349 flow. Second operand 14 states and 3812 transitions. [2023-11-19 07:41:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 875 flow [2023-11-19 07:41:28,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 875 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:28,820 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 419 flow [2023-11-19 07:41:28,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=419, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-11-19 07:41:28,821 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 33 predicate places. [2023-11-19 07:41:28,822 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 419 flow [2023-11-19 07:41:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 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 07:41:28,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:28,823 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:41:28,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:29,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfe221b-06a4-4b89-b18c-5d17c4cf6f44/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:29,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 07:41:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -38917699, now seen corresponding path program 1 times [2023-11-19 07:41:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484218605] [2023-11-19 07:41:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:29,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:29,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:29,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:41:29,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:41:29,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 07:41:29,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 07:41:29,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 07:41:29,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 07:41:29,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 07:41:29,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:41:29,128 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-19 07:41:29,129 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:41:29,129 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:41:29,190 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:41:29,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,567 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-19 07:41:29,567 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:41:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-19 07:41:29,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,600 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:29,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 07:41:29,793 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-19 07:41:29,793 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:41:29,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-19 07:41:29,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 98496 [2023-11-19 07:41:35,035 INFO L134 LiptonReduction]: Checked pairs total: 149931 [2023-11-19 07:41:35,035 INFO L136 LiptonReduction]: Total number of compositions: 311 [2023-11-19 07:41:35,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:35,038 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;@78a3484, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:35,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:41:35,042 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:35,042 INFO L124 PetriNetUnfolderBase]: 13/43 cut-off events. [2023-11-19 07:41:35,043 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:41:35,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:35,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:35,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:41:35,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 850984715, now seen corresponding path program 1 times [2023-11-19 07:41:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815470049] [2023-11-19 07:41:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:35,071 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 07:41:35,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:35,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815470049] [2023-11-19 07:41:35,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815470049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:35,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:35,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:35,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304828021] [2023-11-19 07:41:35,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:35,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 716 [2023-11-19 07:41:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 172 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 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 07:41:35,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:35,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 716 [2023-11-19 07:41:35,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand