./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:30:43,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:30:43,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:30:43,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:30:43,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:30:43,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:30:43,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:30:43,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:30:43,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:30:43,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:30:43,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:30:43,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:30:43,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:30:43,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:30:43,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:30:43,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:30:43,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:30:43,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:30:43,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:30:43,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:30:43,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:30:43,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:30:43,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:30:43,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:30:43,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:30:43,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:30:43,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:30:43,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:30:43,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:30:43,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:30:43,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:30:43,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:30:43,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:30:43,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:30:43,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:30:43,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:30:43,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:30:43,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:30:43,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:30:43,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:30:43,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:30:43,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:30:43,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:30:43,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:30:43,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:30:43,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:30:43,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:30:43,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:30:43,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:30:43,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:30:43,391 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:30:43,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:30:43,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:30:43,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:30:43,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:30:43,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:30:43,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:30:43,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:30:43,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:30:43,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:30:43,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:30:43,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:30:43,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:30:43,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:30:43,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:30:43,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:30:43,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:30:43,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:30:43,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:30:43,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:30:43,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:30:43,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:30:43,399 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:30:43,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:30:43,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:30:43,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2022-11-02 20:30:43,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:30:43,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:30:43,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:30:43,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:30:43,738 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:30:43,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-11-02 20:30:43,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/data/85bed38cb/27df7d63bbb54e90b09f7b21e524330c/FLAG480fa31d7 [2022-11-02 20:30:44,371 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:30:44,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-11-02 20:30:44,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/data/85bed38cb/27df7d63bbb54e90b09f7b21e524330c/FLAG480fa31d7 [2022-11-02 20:30:44,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/data/85bed38cb/27df7d63bbb54e90b09f7b21e524330c [2022-11-02 20:30:44,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:30:44,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:30:44,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:30:44,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:30:44,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:30:44,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:44" (1/1) ... [2022-11-02 20:30:44,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9c6930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:44, skipping insertion in model container [2022-11-02 20:30:44,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:44" (1/1) ... [2022-11-02 20:30:44,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:30:44,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:30:45,240 WARN L230 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_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-11-02 20:30:45,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:30:45,288 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:30:45,345 WARN L230 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_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-11-02 20:30:45,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:30:45,407 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:30:45,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45 WrapperNode [2022-11-02 20:30:45,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:30:45,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:30:45,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:30:45,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:30:45,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,484 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-02 20:30:45,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:30:45,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:30:45,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:30:45,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:30:45,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:30:45,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:30:45,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:30:45,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:30:45,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:30:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:45,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:30:45,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:30:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:30:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:30:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:30:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:30:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:30:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:30:45,649 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:30:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:30:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:30:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:30:45,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:30:45,652 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:30:45,791 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:30:45,793 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:30:46,113 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:30:46,120 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:30:46,121 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-02 20:30:46,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:46 BoogieIcfgContainer [2022-11-02 20:30:46,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:30:46,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:30:46,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:30:46,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:30:46,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:30:44" (1/3) ... [2022-11-02 20:30:46,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f09b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:46, skipping insertion in model container [2022-11-02 20:30:46,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (2/3) ... [2022-11-02 20:30:46,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f09b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:46, skipping insertion in model container [2022-11-02 20:30:46,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:46" (3/3) ... [2022-11-02 20:30:46,148 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2022-11-02 20:30:46,163 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:30:46,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:30:46,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:30:46,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:30:46,301 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:30:46,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 129 transitions, 266 flow [2022-11-02 20:30:46,491 INFO L130 PetriNetUnfolder]: 17/168 cut-off events. [2022-11-02 20:30:46,491 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:30:46,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 390 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-11-02 20:30:46,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 129 transitions, 266 flow [2022-11-02 20:30:46,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 124 transitions, 253 flow [2022-11-02 20:30:46,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:46,538 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:46,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:46,585 INFO L130 PetriNetUnfolder]: 4/99 cut-off events. [2022-11-02 20:30:46,586 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:46,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:46,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:46,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 750050569, now seen corresponding path program 1 times [2022-11-02 20:30:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625592043] [2022-11-02 20:30:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:46,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:46,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625592043] [2022-11-02 20:30:46,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625592043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:46,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:46,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:30:46,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139394720] [2022-11-02 20:30:46,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:46,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:30:46,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:30:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:30:46,952 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 129 [2022-11-02 20:30:46,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 253 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 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) [2022-11-02 20:30:46,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:46,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 129 [2022-11-02 20:30:46,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:47,027 INFO L130 PetriNetUnfolder]: 0/145 cut-off events. [2022-11-02 20:30:47,027 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:30:47,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 145 events. 0/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 220 event pairs, 0 based on Foata normal form. 16/155 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-02 20:30:47,029 INFO L137 encePairwiseOnDemand]: 118/129 looper letters, 1 selfloop transitions, 0 changer transitions 16/112 dead transitions. [2022-11-02 20:30:47,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 231 flow [2022-11-02 20:30:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:30:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:30:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-11-02 20:30:47,043 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2022-11-02 20:30:47,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-11-02 20:30:47,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-11-02 20:30:47,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:47,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-11-02 20:30:47,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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) [2022-11-02 20:30:47,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2022-11-02 20:30:47,057 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2022-11-02 20:30:47,059 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 253 flow. Second operand 2 states and 242 transitions. [2022-11-02 20:30:47,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 231 flow [2022-11-02 20:30:47,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:47,067 INFO L231 Difference]: Finished difference. Result has 116 places, 96 transitions, 197 flow [2022-11-02 20:30:47,069 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=197, PETRI_PLACES=116, PETRI_TRANSITIONS=96} [2022-11-02 20:30:47,073 INFO L287 CegarLoopForPetriNet]: 116 programPoint places, 0 predicate places. [2022-11-02 20:30:47,073 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 96 transitions, 197 flow [2022-11-02 20:30:47,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 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) [2022-11-02 20:30:47,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:47,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:30:47,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:47,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash 456647562, now seen corresponding path program 1 times [2022-11-02 20:30:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:47,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046323426] [2022-11-02 20:30:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:47,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:47,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:47,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046323426] [2022-11-02 20:30:47,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046323426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:47,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:47,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:47,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777965921] [2022-11-02 20:30:47,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:47,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:47,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:47,325 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 129 [2022-11-02 20:30:47,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2022-11-02 20:30:47,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:47,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 129 [2022-11-02 20:30:47,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:47,396 INFO L130 PetriNetUnfolder]: 0/100 cut-off events. [2022-11-02 20:30:47,396 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:47,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 100 events. 0/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:30:47,401 INFO L137 encePairwiseOnDemand]: 126/129 looper letters, 8 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-11-02 20:30:47,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 221 flow [2022-11-02 20:30:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-11-02 20:30:47,405 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8656330749354005 [2022-11-02 20:30:47,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-11-02 20:30:47,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-11-02 20:30:47,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:47,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-11-02 20:30:47,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2022-11-02 20:30:47,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,411 INFO L175 Difference]: Start difference. First operand has 116 places, 96 transitions, 197 flow. Second operand 3 states and 335 transitions. [2022-11-02 20:30:47,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 221 flow [2022-11-02 20:30:47,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:47,414 INFO L231 Difference]: Finished difference. Result has 103 places, 96 transitions, 205 flow [2022-11-02 20:30:47,414 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2022-11-02 20:30:47,415 INFO L287 CegarLoopForPetriNet]: 116 programPoint places, -13 predicate places. [2022-11-02 20:30:47,415 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 205 flow [2022-11-02 20:30:47,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2022-11-02 20:30:47,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:47,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:47,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:30:47,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1230713936, now seen corresponding path program 1 times [2022-11-02 20:30:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:47,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598892830] [2022-11-02 20:30:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:47,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:47,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:47,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:47,523 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:47,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:47,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:47,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:30:47,527 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:30:47,530 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:47,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:30:47,589 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:30:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 166 transitions, 350 flow [2022-11-02 20:30:47,692 INFO L130 PetriNetUnfolder]: 31/269 cut-off events. [2022-11-02 20:30:47,693 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:30:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 269 events. 31/269 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-11-02 20:30:47,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 166 transitions, 350 flow [2022-11-02 20:30:47,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 166 transitions, 350 flow [2022-11-02 20:30:47,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:47,719 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:47,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:47,736 INFO L130 PetriNetUnfolder]: 3/95 cut-off events. [2022-11-02 20:30:47,736 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:47,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:47,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1940867210, now seen corresponding path program 1 times [2022-11-02 20:30:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811590067] [2022-11-02 20:30:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811590067] [2022-11-02 20:30:47,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811590067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:47,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:47,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:47,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746736237] [2022-11-02 20:30:47,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:47,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:47,914 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 166 [2022-11-02 20:30:47,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 166 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-11-02 20:30:47,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:47,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 166 [2022-11-02 20:30:47,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:48,015 INFO L130 PetriNetUnfolder]: 2/218 cut-off events. [2022-11-02 20:30:48,016 INFO L131 PetriNetUnfolder]: For 32/78 co-relation queries the response was YES. [2022-11-02 20:30:48,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 218 events. 2/218 cut-off events. For 32/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 473 event pairs, 0 based on Foata normal form. 63/273 useless extension candidates. Maximal degree in co-relation 130. Up to 16 conditions per place. [2022-11-02 20:30:48,017 INFO L137 encePairwiseOnDemand]: 146/166 looper letters, 11 selfloop transitions, 2 changer transitions 22/152 dead transitions. [2022-11-02 20:30:48,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 152 transitions, 352 flow [2022-11-02 20:30:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2022-11-02 20:30:48,026 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9056224899598394 [2022-11-02 20:30:48,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2022-11-02 20:30:48,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2022-11-02 20:30:48,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:48,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2022-11-02 20:30:48,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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) [2022-11-02 20:30:48,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2022-11-02 20:30:48,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2022-11-02 20:30:48,036 INFO L175 Difference]: Start difference. First operand has 152 places, 166 transitions, 350 flow. Second operand 3 states and 451 transitions. [2022-11-02 20:30:48,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 152 transitions, 352 flow [2022-11-02 20:30:48,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 152 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:48,045 INFO L231 Difference]: Finished difference. Result has 154 places, 127 transitions, 276 flow [2022-11-02 20:30:48,046 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=154, PETRI_TRANSITIONS=127} [2022-11-02 20:30:48,053 INFO L287 CegarLoopForPetriNet]: 152 programPoint places, 2 predicate places. [2022-11-02 20:30:48,053 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 127 transitions, 276 flow [2022-11-02 20:30:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-11-02 20:30:48,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:48,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:48,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:30:48,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1237291022, now seen corresponding path program 1 times [2022-11-02 20:30:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:48,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404016845] [2022-11-02 20:30:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:48,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404016845] [2022-11-02 20:30:48,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404016845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:48,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842025937] [2022-11-02 20:30:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:48,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:48,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:48,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:30:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:30:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:48,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:48,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842025937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:48,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:48,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:30:48,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073144325] [2022-11-02 20:30:48,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:48,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:48,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:48,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:48,641 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 166 [2022-11-02 20:30:48,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 127 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 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) [2022-11-02 20:30:48,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:48,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 166 [2022-11-02 20:30:48,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:48,760 INFO L130 PetriNetUnfolder]: 0/126 cut-off events. [2022-11-02 20:30:48,760 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:30:48,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 126 events. 0/126 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-02 20:30:48,761 INFO L137 encePairwiseOnDemand]: 161/166 looper letters, 9 selfloop transitions, 7 changer transitions 0/120 dead transitions. [2022-11-02 20:30:48,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 120 transitions, 292 flow [2022-11-02 20:30:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:30:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:30:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1242 transitions. [2022-11-02 20:30:48,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8313253012048193 [2022-11-02 20:30:48,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1242 transitions. [2022-11-02 20:30:48,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1242 transitions. [2022-11-02 20:30:48,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:48,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1242 transitions. [2022-11-02 20:30:48,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 138.0) internal successors, (1242), 9 states have internal predecessors, (1242), 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) [2022-11-02 20:30:48,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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) [2022-11-02 20:30:48,776 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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) [2022-11-02 20:30:48,777 INFO L175 Difference]: Start difference. First operand has 154 places, 127 transitions, 276 flow. Second operand 9 states and 1242 transitions. [2022-11-02 20:30:48,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 120 transitions, 292 flow [2022-11-02 20:30:48,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 120 transitions, 288 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-02 20:30:48,785 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 262 flow [2022-11-02 20:30:48,786 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2022-11-02 20:30:48,788 INFO L287 CegarLoopForPetriNet]: 152 programPoint places, -24 predicate places. [2022-11-02 20:30:48,788 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 262 flow [2022-11-02 20:30:48,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 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) [2022-11-02 20:30:48,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:48,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:48,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:49,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:49,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash 882605759, now seen corresponding path program 1 times [2022-11-02 20:30:49,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:49,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243028021] [2022-11-02 20:30:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:49,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:49,038 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:49,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:49,082 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:49,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:49,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:49,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:30:49,083 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:30:49,084 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:49,084 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:30:49,119 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:30:49,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 203 transitions, 436 flow [2022-11-02 20:30:49,205 INFO L130 PetriNetUnfolder]: 50/403 cut-off events. [2022-11-02 20:30:49,205 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:30:49,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 403 events. 50/403 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1408 event pairs, 1 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2022-11-02 20:30:49,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 203 transitions, 436 flow [2022-11-02 20:30:49,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 203 transitions, 436 flow [2022-11-02 20:30:49,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:49,227 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:49,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:49,237 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-02 20:30:49,237 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:49,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:49,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:49,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash -944236407, now seen corresponding path program 1 times [2022-11-02 20:30:49,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603321087] [2022-11-02 20:30:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:49,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603321087] [2022-11-02 20:30:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603321087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:30:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10960341] [2022-11-02 20:30:49,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:30:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:30:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:30:49,303 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 203 [2022-11-02 20:30:49,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 203 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 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) [2022-11-02 20:30:49,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:49,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 203 [2022-11-02 20:30:49,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:49,410 INFO L130 PetriNetUnfolder]: 8/357 cut-off events. [2022-11-02 20:30:49,410 INFO L131 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-11-02 20:30:49,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 357 events. 8/357 cut-off events. For 55/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1134 event pairs, 1 based on Foata normal form. 104/445 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2022-11-02 20:30:49,413 INFO L137 encePairwiseOnDemand]: 180/203 looper letters, 3 selfloop transitions, 0 changer transitions 23/179 dead transitions. [2022-11-02 20:30:49,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 400 flow [2022-11-02 20:30:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:30:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:30:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 375 transitions. [2022-11-02 20:30:49,417 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9236453201970444 [2022-11-02 20:30:49,417 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 375 transitions. [2022-11-02 20:30:49,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 375 transitions. [2022-11-02 20:30:49,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:49,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 375 transitions. [2022-11-02 20:30:49,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.5) internal successors, (375), 2 states have internal predecessors, (375), 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) [2022-11-02 20:30:49,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-11-02 20:30:49,423 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2022-11-02 20:30:49,423 INFO L175 Difference]: Start difference. First operand has 184 places, 203 transitions, 436 flow. Second operand 2 states and 375 transitions. [2022-11-02 20:30:49,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 400 flow [2022-11-02 20:30:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 179 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:49,429 INFO L231 Difference]: Finished difference. Result has 184 places, 156 transitions, 333 flow [2022-11-02 20:30:49,429 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=333, PETRI_PLACES=184, PETRI_TRANSITIONS=156} [2022-11-02 20:30:49,433 INFO L287 CegarLoopForPetriNet]: 184 programPoint places, 0 predicate places. [2022-11-02 20:30:49,433 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 156 transitions, 333 flow [2022-11-02 20:30:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 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) [2022-11-02 20:30:49,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:49,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:49,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:30:49,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1237639414, now seen corresponding path program 1 times [2022-11-02 20:30:49,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:49,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773376235] [2022-11-02 20:30:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:49,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:49,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773376235] [2022-11-02 20:30:49,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773376235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:49,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:49,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49327375] [2022-11-02 20:30:49,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:49,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:49,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:49,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:49,533 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 203 [2022-11-02 20:30:49,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 156 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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) [2022-11-02 20:30:49,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:49,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 203 [2022-11-02 20:30:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:49,595 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-02 20:30:49,595 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:30:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 204 events. 0/204 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 435 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-02 20:30:49,597 INFO L137 encePairwiseOnDemand]: 200/203 looper letters, 12 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2022-11-02 20:30:49,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 160 transitions, 369 flow [2022-11-02 20:30:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-11-02 20:30:49,599 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8423645320197044 [2022-11-02 20:30:49,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-11-02 20:30:49,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-11-02 20:30:49,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:49,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-11-02 20:30:49,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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) [2022-11-02 20:30:49,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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) [2022-11-02 20:30:49,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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) [2022-11-02 20:30:49,604 INFO L175 Difference]: Start difference. First operand has 184 places, 156 transitions, 333 flow. Second operand 3 states and 513 transitions. [2022-11-02 20:30:49,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 160 transitions, 369 flow [2022-11-02 20:30:49,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 160 transitions, 363 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:49,609 INFO L231 Difference]: Finished difference. Result has 167 places, 157 transitions, 339 flow [2022-11-02 20:30:49,609 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=167, PETRI_TRANSITIONS=157} [2022-11-02 20:30:49,610 INFO L287 CegarLoopForPetriNet]: 184 programPoint places, -17 predicate places. [2022-11-02 20:30:49,610 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 157 transitions, 339 flow [2022-11-02 20:30:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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) [2022-11-02 20:30:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:30:49,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1169265333, now seen corresponding path program 1 times [2022-11-02 20:30:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926425419] [2022-11-02 20:30:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:49,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926425419] [2022-11-02 20:30:49,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926425419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:49,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981898211] [2022-11-02 20:30:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:49,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:49,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:30:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:30:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:49,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:49,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981898211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:49,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:49,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:30:49,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073138936] [2022-11-02 20:30:49,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:49,962 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 203 [2022-11-02 20:30:49,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 157 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 167.3) internal successors, (1673), 10 states have internal predecessors, (1673), 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) [2022-11-02 20:30:49,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:49,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 203 [2022-11-02 20:30:49,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:50,100 INFO L130 PetriNetUnfolder]: 0/178 cut-off events. [2022-11-02 20:30:50,101 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:30:50,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 178 events. 0/178 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:30:50,102 INFO L137 encePairwiseOnDemand]: 197/203 looper letters, 13 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-11-02 20:30:50,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 405 flow [2022-11-02 20:30:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:30:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:30:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1509 transitions. [2022-11-02 20:30:50,107 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.825944170771757 [2022-11-02 20:30:50,107 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1509 transitions. [2022-11-02 20:30:50,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1509 transitions. [2022-11-02 20:30:50,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:50,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1509 transitions. [2022-11-02 20:30:50,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 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) [2022-11-02 20:30:50,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 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) [2022-11-02 20:30:50,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 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) [2022-11-02 20:30:50,118 INFO L175 Difference]: Start difference. First operand has 167 places, 157 transitions, 339 flow. Second operand 9 states and 1509 transitions. [2022-11-02 20:30:50,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 405 flow [2022-11-02 20:30:50,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 167 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:30:50,122 INFO L231 Difference]: Finished difference. Result has 177 places, 163 transitions, 387 flow [2022-11-02 20:30:50,123 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=387, PETRI_PLACES=177, PETRI_TRANSITIONS=163} [2022-11-02 20:30:50,123 INFO L287 CegarLoopForPetriNet]: 184 programPoint places, -7 predicate places. [2022-11-02 20:30:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 163 transitions, 387 flow [2022-11-02 20:30:50,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 167.3) internal successors, (1673), 10 states have internal predecessors, (1673), 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) [2022-11-02 20:30:50,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:50,125 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:50,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:50,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash -453477867, now seen corresponding path program 1 times [2022-11-02 20:30:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:50,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878820710] [2022-11-02 20:30:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:50,381 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:50,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:50,424 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:50,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:50,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:30:50,425 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:30:50,426 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:50,426 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:30:50,493 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:30:50,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 240 transitions, 524 flow [2022-11-02 20:30:50,620 INFO L130 PetriNetUnfolder]: 81/605 cut-off events. [2022-11-02 20:30:50,620 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-02 20:30:50,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 605 events. 81/605 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2377 event pairs, 6 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2022-11-02 20:30:50,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 240 transitions, 524 flow [2022-11-02 20:30:50,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 240 transitions, 524 flow [2022-11-02 20:30:50,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:50,635 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:50,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:50,644 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-02 20:30:50,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:50,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:50,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash -488937718, now seen corresponding path program 1 times [2022-11-02 20:30:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739815353] [2022-11-02 20:30:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739815353] [2022-11-02 20:30:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739815353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:50,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:50,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840593500] [2022-11-02 20:30:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:50,691 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 240 [2022-11-02 20:30:50,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 240 transitions, 524 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:50,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:50,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 240 [2022-11-02 20:30:50,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:50,871 INFO L130 PetriNetUnfolder]: 20/520 cut-off events. [2022-11-02 20:30:50,871 INFO L131 PetriNetUnfolder]: For 112/169 co-relation queries the response was YES. [2022-11-02 20:30:50,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 520 events. 20/520 cut-off events. For 112/169 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2070 event pairs, 6 based on Foata normal form. 381/877 useless extension candidates. Maximal degree in co-relation 391. Up to 56 conditions per place. [2022-11-02 20:30:50,878 INFO L137 encePairwiseOnDemand]: 208/240 looper letters, 13 selfloop transitions, 2 changer transitions 24/214 dead transitions. [2022-11-02 20:30:50,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 214 transitions, 510 flow [2022-11-02 20:30:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-11-02 20:30:50,881 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8902777777777777 [2022-11-02 20:30:50,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-11-02 20:30:50,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-11-02 20:30:50,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:50,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-11-02 20:30:50,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-11-02 20:30:50,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2022-11-02 20:30:50,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2022-11-02 20:30:50,887 INFO L175 Difference]: Start difference. First operand has 216 places, 240 transitions, 524 flow. Second operand 3 states and 641 transitions. [2022-11-02 20:30:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 214 transitions, 510 flow [2022-11-02 20:30:50,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 214 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:50,914 INFO L231 Difference]: Finished difference. Result has 218 places, 187 transitions, 416 flow [2022-11-02 20:30:50,915 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=218, PETRI_TRANSITIONS=187} [2022-11-02 20:30:50,916 INFO L287 CegarLoopForPetriNet]: 216 programPoint places, 2 predicate places. [2022-11-02 20:30:50,916 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 187 transitions, 416 flow [2022-11-02 20:30:50,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:50,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:50,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:50,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:30:50,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1107873304, now seen corresponding path program 1 times [2022-11-02 20:30:50,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:50,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836966268] [2022-11-02 20:30:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:50,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836966268] [2022-11-02 20:30:51,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836966268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529164008] [2022-11-02 20:30:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:51,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:51,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:51,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:30:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:30:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:51,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:51,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529164008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:51,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:51,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:30:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457114821] [2022-11-02 20:30:51,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:51,326 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 240 [2022-11-02 20:30:51,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 187 transitions, 416 flow. Second operand has 10 states, 10 states have (on average 196.3) internal successors, (1963), 10 states have internal predecessors, (1963), 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) [2022-11-02 20:30:51,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:51,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 240 [2022-11-02 20:30:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:51,484 INFO L130 PetriNetUnfolder]: 0/230 cut-off events. [2022-11-02 20:30:51,485 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:30:51,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 230 events. 0/230 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 482 event pairs, 0 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:30:51,486 INFO L137 encePairwiseOnDemand]: 234/240 looper letters, 14 selfloop transitions, 9 changer transitions 0/197 dead transitions. [2022-11-02 20:30:51,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 197 transitions, 484 flow [2022-11-02 20:30:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:30:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:30:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1771 transitions. [2022-11-02 20:30:51,491 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8199074074074074 [2022-11-02 20:30:51,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1771 transitions. [2022-11-02 20:30:51,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1771 transitions. [2022-11-02 20:30:51,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:51,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1771 transitions. [2022-11-02 20:30:51,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.77777777777777) internal successors, (1771), 9 states have internal predecessors, (1771), 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) [2022-11-02 20:30:51,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 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) [2022-11-02 20:30:51,504 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 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) [2022-11-02 20:30:51,504 INFO L175 Difference]: Start difference. First operand has 218 places, 187 transitions, 416 flow. Second operand 9 states and 1771 transitions. [2022-11-02 20:30:51,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 197 transitions, 484 flow [2022-11-02 20:30:51,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 197 transitions, 470 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:30:51,510 INFO L231 Difference]: Finished difference. Result has 208 places, 193 transitions, 452 flow [2022-11-02 20:30:51,511 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=208, PETRI_TRANSITIONS=193} [2022-11-02 20:30:51,511 INFO L287 CegarLoopForPetriNet]: 216 programPoint places, -8 predicate places. [2022-11-02 20:30:51,512 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 193 transitions, 452 flow [2022-11-02 20:30:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 196.3) internal successors, (1963), 10 states have internal predecessors, (1963), 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) [2022-11-02 20:30:51,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:51,514 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:51,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:51,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2077833143, now seen corresponding path program 1 times [2022-11-02 20:30:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:51,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305087764] [2022-11-02 20:30:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:51,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305087764] [2022-11-02 20:30:51,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305087764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176444392] [2022-11-02 20:30:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:51,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:51,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:51,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:30:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:30:52,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:52,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:52,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176444392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:52,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:52,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:30:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499140748] [2022-11-02 20:30:52,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:52,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:30:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:30:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:30:52,339 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 240 [2022-11-02 20:30:52,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 193 transitions, 452 flow. Second operand has 18 states, 18 states have (on average 196.61111111111111) internal successors, (3539), 18 states have internal predecessors, (3539), 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) [2022-11-02 20:30:52,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:52,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 240 [2022-11-02 20:30:52,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:52,571 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-02 20:30:52,572 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:30:52,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 204 events. 0/204 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 329 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:30:52,573 INFO L137 encePairwiseOnDemand]: 235/240 looper letters, 15 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2022-11-02 20:30:52,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 190 transitions, 514 flow [2022-11-02 20:30:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:30:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 20:30:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2940 transitions. [2022-11-02 20:30:52,582 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8166666666666667 [2022-11-02 20:30:52,582 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2940 transitions. [2022-11-02 20:30:52,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2940 transitions. [2022-11-02 20:30:52,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:52,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2940 transitions. [2022-11-02 20:30:52,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 196.0) internal successors, (2940), 15 states have internal predecessors, (2940), 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) [2022-11-02 20:30:52,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 240.0) internal successors, (3840), 16 states have internal predecessors, (3840), 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) [2022-11-02 20:30:52,605 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 240.0) internal successors, (3840), 16 states have internal predecessors, (3840), 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) [2022-11-02 20:30:52,606 INFO L175 Difference]: Start difference. First operand has 208 places, 193 transitions, 452 flow. Second operand 15 states and 2940 transitions. [2022-11-02 20:30:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 190 transitions, 514 flow [2022-11-02 20:30:52,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 190 transitions, 497 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-02 20:30:52,612 INFO L231 Difference]: Finished difference. Result has 205 places, 183 transitions, 446 flow [2022-11-02 20:30:52,613 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=446, PETRI_PLACES=205, PETRI_TRANSITIONS=183} [2022-11-02 20:30:52,613 INFO L287 CegarLoopForPetriNet]: 216 programPoint places, -11 predicate places. [2022-11-02 20:30:52,614 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 183 transitions, 446 flow [2022-11-02 20:30:52,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 196.61111111111111) internal successors, (3539), 18 states have internal predecessors, (3539), 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) [2022-11-02 20:30:52,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:52,616 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:52,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:52,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:30:52,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -680270030, now seen corresponding path program 1 times [2022-11-02 20:30:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:52,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545491282] [2022-11-02 20:30:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:52,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:52,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:52,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:52,922 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:52,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:52,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:30:52,924 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:30:52,926 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:52,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:30:52,970 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-02 20:30:52,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 277 transitions, 614 flow [2022-11-02 20:30:53,226 INFO L130 PetriNetUnfolder]: 140/947 cut-off events. [2022-11-02 20:30:53,226 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-02 20:30:53,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 947 events. 140/947 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4411 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 650. Up to 80 conditions per place. [2022-11-02 20:30:53,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 277 transitions, 614 flow [2022-11-02 20:30:53,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 277 transitions, 614 flow [2022-11-02 20:30:53,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:53,253 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:53,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:53,263 INFO L130 PetriNetUnfolder]: 4/100 cut-off events. [2022-11-02 20:30:53,263 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:53,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:53,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:53,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash -107994998, now seen corresponding path program 1 times [2022-11-02 20:30:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802682422] [2022-11-02 20:30:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:53,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:53,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802682422] [2022-11-02 20:30:53,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802682422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:53,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:53,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134120978] [2022-11-02 20:30:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:53,308 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 277 [2022-11-02 20:30:53,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 277 transitions, 614 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2022-11-02 20:30:53,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:53,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 277 [2022-11-02 20:30:53,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:53,622 INFO L130 PetriNetUnfolder]: 53/835 cut-off events. [2022-11-02 20:30:53,622 INFO L131 PetriNetUnfolder]: For 270/346 co-relation queries the response was YES. [2022-11-02 20:30:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 835 events. 53/835 cut-off events. For 270/346 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3950 event pairs, 23 based on Foata normal form. 808/1601 useless extension candidates. Maximal degree in co-relation 625. Up to 110 conditions per place. [2022-11-02 20:30:53,630 INFO L137 encePairwiseOnDemand]: 239/277 looper letters, 14 selfloop transitions, 2 changer transitions 25/245 dead transitions. [2022-11-02 20:30:53,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 245 transitions, 592 flow [2022-11-02 20:30:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2022-11-02 20:30:53,633 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8856799037304453 [2022-11-02 20:30:53,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2022-11-02 20:30:53,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2022-11-02 20:30:53,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:53,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2022-11-02 20:30:53,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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) [2022-11-02 20:30:53,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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) [2022-11-02 20:30:53,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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) [2022-11-02 20:30:53,640 INFO L175 Difference]: Start difference. First operand has 248 places, 277 transitions, 614 flow. Second operand 3 states and 736 transitions. [2022-11-02 20:30:53,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 245 transitions, 592 flow [2022-11-02 20:30:53,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 245 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:53,645 INFO L231 Difference]: Finished difference. Result has 250 places, 217 transitions, 489 flow [2022-11-02 20:30:53,646 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=489, PETRI_PLACES=250, PETRI_TRANSITIONS=217} [2022-11-02 20:30:53,647 INFO L287 CegarLoopForPetriNet]: 248 programPoint places, 2 predicate places. [2022-11-02 20:30:53,647 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 217 transitions, 489 flow [2022-11-02 20:30:53,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2022-11-02 20:30:53,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:53,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:53,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:30:53,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1421467109, now seen corresponding path program 1 times [2022-11-02 20:30:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659763977] [2022-11-02 20:30:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659763977] [2022-11-02 20:30:53,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659763977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983236917] [2022-11-02 20:30:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:53,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:53,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:53,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:30:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:30:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:53,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983236917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:53,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:53,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:30:53,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064933529] [2022-11-02 20:30:53,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:53,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:53,973 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-11-02 20:30:53,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 217 transitions, 489 flow. Second operand has 10 states, 10 states have (on average 225.3) internal successors, (2253), 10 states have internal predecessors, (2253), 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) [2022-11-02 20:30:53,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:53,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-11-02 20:30:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:54,167 INFO L130 PetriNetUnfolder]: 0/282 cut-off events. [2022-11-02 20:30:54,168 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-02 20:30:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 282 events. 0/282 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 689 event pairs, 0 based on Foata normal form. 2/284 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:30:54,169 INFO L137 encePairwiseOnDemand]: 271/277 looper letters, 15 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-11-02 20:30:54,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 227 transitions, 559 flow [2022-11-02 20:30:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:30:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:30:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2033 transitions. [2022-11-02 20:30:54,175 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8154833533894906 [2022-11-02 20:30:54,176 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2033 transitions. [2022-11-02 20:30:54,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2033 transitions. [2022-11-02 20:30:54,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:54,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2033 transitions. [2022-11-02 20:30:54,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.88888888888889) internal successors, (2033), 9 states have internal predecessors, (2033), 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) [2022-11-02 20:30:54,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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) [2022-11-02 20:30:54,192 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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) [2022-11-02 20:30:54,192 INFO L175 Difference]: Start difference. First operand has 250 places, 217 transitions, 489 flow. Second operand 9 states and 2033 transitions. [2022-11-02 20:30:54,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 227 transitions, 559 flow [2022-11-02 20:30:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 227 transitions, 537 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-11-02 20:30:54,199 INFO L231 Difference]: Finished difference. Result has 240 places, 223 transitions, 517 flow [2022-11-02 20:30:54,199 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=517, PETRI_PLACES=240, PETRI_TRANSITIONS=223} [2022-11-02 20:30:54,200 INFO L287 CegarLoopForPetriNet]: 248 programPoint places, -8 predicate places. [2022-11-02 20:30:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 223 transitions, 517 flow [2022-11-02 20:30:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 225.3) internal successors, (2253), 10 states have internal predecessors, (2253), 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) [2022-11-02 20:30:54,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:54,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:54,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:30:54,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1498719872, now seen corresponding path program 1 times [2022-11-02 20:30:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:54,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315299505] [2022-11-02 20:30:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315299505] [2022-11-02 20:30:54,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315299505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620806930] [2022-11-02 20:30:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:54,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:54,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:54,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:30:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:30:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:54,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:54,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620806930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:54,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:54,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:30:54,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785404060] [2022-11-02 20:30:54,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:30:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:30:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:30:54,977 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-11-02 20:30:54,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 223 transitions, 517 flow. Second operand has 18 states, 18 states have (on average 225.61111111111111) internal successors, (4061), 18 states have internal predecessors, (4061), 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) [2022-11-02 20:30:54,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:54,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-11-02 20:30:54,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:55,271 INFO L130 PetriNetUnfolder]: 0/243 cut-off events. [2022-11-02 20:30:55,272 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:30:55,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 243 events. 0/243 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 445 event pairs, 0 based on Foata normal form. 3/246 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:30:55,273 INFO L137 encePairwiseOnDemand]: 272/277 looper letters, 18 selfloop transitions, 16 changer transitions 0/225 dead transitions. [2022-11-02 20:30:55,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 225 transitions, 615 flow [2022-11-02 20:30:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:30:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:30:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4051 transitions. [2022-11-02 20:30:55,286 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8124749298034497 [2022-11-02 20:30:55,286 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4051 transitions. [2022-11-02 20:30:55,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4051 transitions. [2022-11-02 20:30:55,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:55,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4051 transitions. [2022-11-02 20:30:55,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 225.05555555555554) internal successors, (4051), 18 states have internal predecessors, (4051), 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) [2022-11-02 20:30:55,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 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) [2022-11-02 20:30:55,316 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 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) [2022-11-02 20:30:55,316 INFO L175 Difference]: Start difference. First operand has 240 places, 223 transitions, 517 flow. Second operand 18 states and 4051 transitions. [2022-11-02 20:30:55,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 225 transitions, 615 flow [2022-11-02 20:30:55,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 225 transitions, 594 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-02 20:30:55,324 INFO L231 Difference]: Finished difference. Result has 240 places, 216 transitions, 530 flow [2022-11-02 20:30:55,324 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=530, PETRI_PLACES=240, PETRI_TRANSITIONS=216} [2022-11-02 20:30:55,325 INFO L287 CegarLoopForPetriNet]: 248 programPoint places, -8 predicate places. [2022-11-02 20:30:55,325 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 216 transitions, 530 flow [2022-11-02 20:30:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 225.61111111111111) internal successors, (4061), 18 states have internal predecessors, (4061), 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) [2022-11-02 20:30:55,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:55,327 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:55,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:55,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:30:55,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:55,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1389140234, now seen corresponding path program 1 times [2022-11-02 20:30:55,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:55,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134019950] [2022-11-02 20:30:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:55,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:55,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:55,603 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:55,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:55,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:55,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:30:55,604 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:30:55,605 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:55,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-02 20:30:55,653 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-02 20:30:55,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 314 transitions, 706 flow [2022-11-02 20:30:56,079 INFO L130 PetriNetUnfolder]: 263/1577 cut-off events. [2022-11-02 20:30:56,079 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-02 20:30:56,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 1577 events. 263/1577 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8839 event pairs, 72 based on Foata normal form. 0/1371 useless extension candidates. Maximal degree in co-relation 1046. Up to 192 conditions per place. [2022-11-02 20:30:56,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 314 transitions, 706 flow [2022-11-02 20:30:56,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 314 transitions, 706 flow [2022-11-02 20:30:56,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:56,133 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:56,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:30:56,142 INFO L130 PetriNetUnfolder]: 4/96 cut-off events. [2022-11-02 20:30:56,142 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:30:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:56,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash 198591753, now seen corresponding path program 1 times [2022-11-02 20:30:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700885453] [2022-11-02 20:30:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:56,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700885453] [2022-11-02 20:30:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700885453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:56,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:30:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983209832] [2022-11-02 20:30:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:30:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:30:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:30:56,183 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 314 [2022-11-02 20:30:56,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 314 transitions, 706 flow. Second operand has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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) [2022-11-02 20:30:56,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:56,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 314 [2022-11-02 20:30:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:56,642 INFO L130 PetriNetUnfolder]: 135/1442 cut-off events. [2022-11-02 20:30:56,642 INFO L131 PetriNetUnfolder]: For 650/674 co-relation queries the response was YES. [2022-11-02 20:30:56,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 1442 events. 135/1442 cut-off events. For 650/674 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8521 event pairs, 72 based on Foata normal form. 1306/2670 useless extension candidates. Maximal degree in co-relation 1039. Up to 199 conditions per place. [2022-11-02 20:30:56,662 INFO L137 encePairwiseOnDemand]: 273/314 looper letters, 6 selfloop transitions, 0 changer transitions 26/272 dead transitions. [2022-11-02 20:30:56,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 272 transitions, 646 flow [2022-11-02 20:30:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:30:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:30:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 573 transitions. [2022-11-02 20:30:56,665 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9124203821656051 [2022-11-02 20:30:56,665 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 573 transitions. [2022-11-02 20:30:56,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 573 transitions. [2022-11-02 20:30:56,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:56,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 573 transitions. [2022-11-02 20:30:56,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 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) [2022-11-02 20:30:56,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 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) [2022-11-02 20:30:56,669 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 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) [2022-11-02 20:30:56,669 INFO L175 Difference]: Start difference. First operand has 280 places, 314 transitions, 706 flow. Second operand 2 states and 573 transitions. [2022-11-02 20:30:56,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 272 transitions, 646 flow [2022-11-02 20:30:56,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 272 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:56,675 INFO L231 Difference]: Finished difference. Result has 280 places, 246 transitions, 552 flow [2022-11-02 20:30:56,676 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=552, PETRI_PLACES=280, PETRI_TRANSITIONS=246} [2022-11-02 20:30:56,676 INFO L287 CegarLoopForPetriNet]: 280 programPoint places, 0 predicate places. [2022-11-02 20:30:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 246 transitions, 552 flow [2022-11-02 20:30:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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) [2022-11-02 20:30:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:56,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:30:56,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash -94811254, now seen corresponding path program 1 times [2022-11-02 20:30:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:56,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761795342] [2022-11-02 20:30:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:56,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761795342] [2022-11-02 20:30:56,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761795342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:56,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:56,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:56,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784938651] [2022-11-02 20:30:56,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:56,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:56,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:56,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:56,723 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 314 [2022-11-02 20:30:56,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 246 transitions, 552 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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) [2022-11-02 20:30:56,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:56,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 314 [2022-11-02 20:30:56,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:56,830 INFO L130 PetriNetUnfolder]: 0/360 cut-off events. [2022-11-02 20:30:56,831 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:30:56,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 360 events. 0/360 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1052 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-02 20:30:56,832 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 15 selfloop transitions, 2 changer transitions 0/250 dead transitions. [2022-11-02 20:30:56,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 250 transitions, 594 flow [2022-11-02 20:30:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:30:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2022-11-02 20:30:56,835 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8248407643312102 [2022-11-02 20:30:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2022-11-02 20:30:56,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2022-11-02 20:30:56,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:56,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2022-11-02 20:30:56,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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) [2022-11-02 20:30:56,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-02 20:30:56,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2022-11-02 20:30:56,842 INFO L175 Difference]: Start difference. First operand has 280 places, 246 transitions, 552 flow. Second operand 3 states and 777 transitions. [2022-11-02 20:30:56,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 250 transitions, 594 flow [2022-11-02 20:30:56,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 250 transitions, 564 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-02 20:30:56,849 INFO L231 Difference]: Finished difference. Result has 263 places, 247 transitions, 534 flow [2022-11-02 20:30:56,850 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=534, PETRI_PLACES=263, PETRI_TRANSITIONS=247} [2022-11-02 20:30:56,851 INFO L287 CegarLoopForPetriNet]: 280 programPoint places, -17 predicate places. [2022-11-02 20:30:56,851 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 247 transitions, 534 flow [2022-11-02 20:30:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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) [2022-11-02 20:30:56,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:56,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:56,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:30:56,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:56,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2123788610, now seen corresponding path program 1 times [2022-11-02 20:30:56,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:56,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770474946] [2022-11-02 20:30:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:56,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770474946] [2022-11-02 20:30:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770474946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895937304] [2022-11-02 20:30:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:56,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:56,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:30:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:30:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:57,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:57,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895937304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:57,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:57,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:30:57,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746452028] [2022-11-02 20:30:57,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:57,167 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 314 [2022-11-02 20:30:57,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 247 transitions, 534 flow. Second operand has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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) [2022-11-02 20:30:57,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:57,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 314 [2022-11-02 20:30:57,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:57,344 INFO L130 PetriNetUnfolder]: 0/334 cut-off events. [2022-11-02 20:30:57,344 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:30:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 334 events. 0/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 900 event pairs, 0 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:30:57,345 INFO L137 encePairwiseOnDemand]: 308/314 looper letters, 16 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2022-11-02 20:30:57,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 257 transitions, 606 flow [2022-11-02 20:30:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:30:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:30:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2295 transitions. [2022-11-02 20:30:57,353 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8121019108280255 [2022-11-02 20:30:57,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2295 transitions. [2022-11-02 20:30:57,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2295 transitions. [2022-11-02 20:30:57,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:57,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2295 transitions. [2022-11-02 20:30:57,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 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) [2022-11-02 20:30:57,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 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) [2022-11-02 20:30:57,369 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 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) [2022-11-02 20:30:57,369 INFO L175 Difference]: Start difference. First operand has 263 places, 247 transitions, 534 flow. Second operand 9 states and 2295 transitions. [2022-11-02 20:30:57,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 257 transitions, 606 flow [2022-11-02 20:30:57,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 257 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:30:57,375 INFO L231 Difference]: Finished difference. Result has 273 places, 253 transitions, 582 flow [2022-11-02 20:30:57,376 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=582, PETRI_PLACES=273, PETRI_TRANSITIONS=253} [2022-11-02 20:30:57,376 INFO L287 CegarLoopForPetriNet]: 280 programPoint places, -7 predicate places. [2022-11-02 20:30:57,377 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 253 transitions, 582 flow [2022-11-02 20:30:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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) [2022-11-02 20:30:57,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:57,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:57,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:57,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1220389417, now seen corresponding path program 1 times [2022-11-02 20:30:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750820894] [2022-11-02 20:30:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750820894] [2022-11-02 20:30:57,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750820894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483105421] [2022-11-02 20:30:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:57,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:57,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:30:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:30:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:58,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:58,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483105421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:58,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:58,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:30:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559666938] [2022-11-02 20:30:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:30:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:58,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:30:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:30:58,178 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 314 [2022-11-02 20:30:58,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 253 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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) [2022-11-02 20:30:58,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:58,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 314 [2022-11-02 20:30:58,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:30:58,466 INFO L130 PetriNetUnfolder]: 0/282 cut-off events. [2022-11-02 20:30:58,466 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:30:58,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 282 events. 0/282 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 561 event pairs, 0 based on Foata normal form. 4/286 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-02 20:30:58,467 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 21 selfloop transitions, 19 changer transitions 0/260 dead transitions. [2022-11-02 20:30:58,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 260 transitions, 716 flow [2022-11-02 20:30:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:30:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:30:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5336 transitions. [2022-11-02 20:30:58,475 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8092205034880194 [2022-11-02 20:30:58,476 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5336 transitions. [2022-11-02 20:30:58,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5336 transitions. [2022-11-02 20:30:58,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:30:58,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5336 transitions. [2022-11-02 20:30:58,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 254.0952380952381) internal successors, (5336), 21 states have internal predecessors, (5336), 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) [2022-11-02 20:30:58,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 314.0) internal successors, (6908), 22 states have internal predecessors, (6908), 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) [2022-11-02 20:30:58,501 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 314.0) internal successors, (6908), 22 states have internal predecessors, (6908), 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) [2022-11-02 20:30:58,501 INFO L175 Difference]: Start difference. First operand has 273 places, 253 transitions, 582 flow. Second operand 21 states and 5336 transitions. [2022-11-02 20:30:58,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 260 transitions, 716 flow [2022-11-02 20:30:58,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 260 transitions, 691 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-02 20:30:58,508 INFO L231 Difference]: Finished difference. Result has 276 places, 249 transitions, 614 flow [2022-11-02 20:30:58,509 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=614, PETRI_PLACES=276, PETRI_TRANSITIONS=249} [2022-11-02 20:30:58,511 INFO L287 CegarLoopForPetriNet]: 280 programPoint places, -4 predicate places. [2022-11-02 20:30:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 249 transitions, 614 flow [2022-11-02 20:30:58,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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) [2022-11-02 20:30:58,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:58,514 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:58,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:58,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:30:58,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 781482561, now seen corresponding path program 1 times [2022-11-02 20:30:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:58,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796245286] [2022-11-02 20:30:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:58,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:30:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:30:58,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:30:58,812 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:30:58,813 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:30:58,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:30:58,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:30:58,813 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:30:58,816 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:30:58,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-02 20:30:58,879 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-02 20:30:58,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 351 transitions, 800 flow [2022-11-02 20:30:59,908 INFO L130 PetriNetUnfolder]: 530/2799 cut-off events. [2022-11-02 20:30:59,908 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-02 20:30:59,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 2799 events. 530/2799 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 19042 event pairs, 201 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 1795. Up to 448 conditions per place. [2022-11-02 20:30:59,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 351 transitions, 800 flow [2022-11-02 20:31:00,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 351 transitions, 800 flow [2022-11-02 20:31:00,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:00,017 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:00,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:31:00,026 INFO L130 PetriNetUnfolder]: 4/96 cut-off events. [2022-11-02 20:31:00,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:31:00,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:00,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:00,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:00,027 INFO L85 PathProgramCache]: Analyzing trace with hash -449386486, now seen corresponding path program 1 times [2022-11-02 20:31:00,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:00,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088765067] [2022-11-02 20:31:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:00,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:00,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:00,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088765067] [2022-11-02 20:31:00,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088765067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:00,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:00,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:31:00,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704063957] [2022-11-02 20:31:00,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:31:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:31:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:31:00,131 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 351 [2022-11-02 20:31:00,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 351 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2022-11-02 20:31:00,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:00,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 351 [2022-11-02 20:31:00,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:01,348 INFO L130 PetriNetUnfolder]: 327/2569 cut-off events. [2022-11-02 20:31:01,349 INFO L131 PetriNetUnfolder]: For 1507/1784 co-relation queries the response was YES. [2022-11-02 20:31:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3562 conditions, 2569 events. 327/2569 cut-off events. For 1507/1784 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18301 event pairs, 201 based on Foata normal form. 3464/5891 useless extension candidates. Maximal degree in co-relation 1872. Up to 490 conditions per place. [2022-11-02 20:31:01,383 INFO L137 encePairwiseOnDemand]: 301/351 looper letters, 16 selfloop transitions, 2 changer transitions 27/307 dead transitions. [2022-11-02 20:31:01,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 307 transitions, 762 flow [2022-11-02 20:31:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:31:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:31:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2022-11-02 20:31:01,386 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.879392212725546 [2022-11-02 20:31:01,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2022-11-02 20:31:01,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2022-11-02 20:31:01,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:01,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2022-11-02 20:31:01,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 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) [2022-11-02 20:31:01,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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) [2022-11-02 20:31:01,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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) [2022-11-02 20:31:01,392 INFO L175 Difference]: Start difference. First operand has 312 places, 351 transitions, 800 flow. Second operand 3 states and 926 transitions. [2022-11-02 20:31:01,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 307 transitions, 762 flow [2022-11-02 20:31:01,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 307 transitions, 762 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:31:01,399 INFO L231 Difference]: Finished difference. Result has 314 places, 277 transitions, 641 flow [2022-11-02 20:31:01,400 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=641, PETRI_PLACES=314, PETRI_TRANSITIONS=277} [2022-11-02 20:31:01,400 INFO L287 CegarLoopForPetriNet]: 312 programPoint places, 2 predicate places. [2022-11-02 20:31:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 277 transitions, 641 flow [2022-11-02 20:31:01,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2022-11-02 20:31:01,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:01,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-02 20:31:01,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash -999091199, now seen corresponding path program 1 times [2022-11-02 20:31:01,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:01,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080059064] [2022-11-02 20:31:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:01,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:01,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080059064] [2022-11-02 20:31:01,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080059064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:01,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282208676] [2022-11-02 20:31:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:01,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:01,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:01,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:31:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:31:01,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:01,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:01,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282208676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:01,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:01,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:31:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062571167] [2022-11-02 20:31:01,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:31:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:31:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:31:01,741 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 351 [2022-11-02 20:31:01,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 277 transitions, 641 flow. Second operand has 10 states, 10 states have (on average 283.3) internal successors, (2833), 10 states have internal predecessors, (2833), 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) [2022-11-02 20:31:01,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:01,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 351 [2022-11-02 20:31:01,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:01,981 INFO L130 PetriNetUnfolder]: 0/386 cut-off events. [2022-11-02 20:31:01,981 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-02 20:31:01,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 386 events. 0/386 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1103 event pairs, 0 based on Foata normal form. 2/388 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:31:01,982 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 17 selfloop transitions, 9 changer transitions 0/287 dead transitions. [2022-11-02 20:31:01,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 287 transitions, 715 flow [2022-11-02 20:31:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2557 transitions. [2022-11-02 20:31:01,989 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8094333649889205 [2022-11-02 20:31:01,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2557 transitions. [2022-11-02 20:31:01,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2557 transitions. [2022-11-02 20:31:01,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:01,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2557 transitions. [2022-11-02 20:31:01,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.1111111111111) internal successors, (2557), 9 states have internal predecessors, (2557), 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) [2022-11-02 20:31:02,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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) [2022-11-02 20:31:02,005 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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) [2022-11-02 20:31:02,005 INFO L175 Difference]: Start difference. First operand has 314 places, 277 transitions, 641 flow. Second operand 9 states and 2557 transitions. [2022-11-02 20:31:02,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 287 transitions, 715 flow [2022-11-02 20:31:02,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 287 transitions, 671 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:02,011 INFO L231 Difference]: Finished difference. Result has 304 places, 283 transitions, 647 flow [2022-11-02 20:31:02,012 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=647, PETRI_PLACES=304, PETRI_TRANSITIONS=283} [2022-11-02 20:31:02,013 INFO L287 CegarLoopForPetriNet]: 312 programPoint places, -8 predicate places. [2022-11-02 20:31:02,013 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 283 transitions, 647 flow [2022-11-02 20:31:02,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.3) internal successors, (2833), 10 states have internal predecessors, (2833), 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) [2022-11-02 20:31:02,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:02,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:02,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:02,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:02,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1645226418, now seen corresponding path program 1 times [2022-11-02 20:31:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063222260] [2022-11-02 20:31:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:02,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063222260] [2022-11-02 20:31:02,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063222260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727960967] [2022-11-02 20:31:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:02,397 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:02,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:31:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:02,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:31:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:02,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:02,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727960967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:02,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:02,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:31:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970913390] [2022-11-02 20:31:02,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:31:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:31:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:31:02,787 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 351 [2022-11-02 20:31:02,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 283 transitions, 647 flow. Second operand has 18 states, 18 states have (on average 283.6111111111111) internal successors, (5105), 18 states have internal predecessors, (5105), 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) [2022-11-02 20:31:02,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:02,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 351 [2022-11-02 20:31:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:03,112 INFO L130 PetriNetUnfolder]: 0/334 cut-off events. [2022-11-02 20:31:03,112 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-02 20:31:03,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 334 events. 0/334 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 739 event pairs, 0 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:31:03,113 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 25 selfloop transitions, 21 changer transitions 0/307 dead transitions. [2022-11-02 20:31:03,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 307 transitions, 847 flow [2022-11-02 20:31:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:31:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5951 transitions. [2022-11-02 20:31:03,124 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.807353140686474 [2022-11-02 20:31:03,124 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5951 transitions. [2022-11-02 20:31:03,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5951 transitions. [2022-11-02 20:31:03,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:03,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5951 transitions. [2022-11-02 20:31:03,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 283.3809523809524) internal successors, (5951), 21 states have internal predecessors, (5951), 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) [2022-11-02 20:31:03,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 351.0) internal successors, (7722), 22 states have internal predecessors, (7722), 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) [2022-11-02 20:31:03,149 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 351.0) internal successors, (7722), 22 states have internal predecessors, (7722), 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) [2022-11-02 20:31:03,149 INFO L175 Difference]: Start difference. First operand has 304 places, 283 transitions, 647 flow. Second operand 21 states and 5951 transitions. [2022-11-02 20:31:03,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 307 transitions, 847 flow [2022-11-02 20:31:03,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 307 transitions, 833 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:03,183 INFO L231 Difference]: Finished difference. Result has 328 places, 296 transitions, 771 flow [2022-11-02 20:31:03,184 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=771, PETRI_PLACES=328, PETRI_TRANSITIONS=296} [2022-11-02 20:31:03,184 INFO L287 CegarLoopForPetriNet]: 312 programPoint places, 16 predicate places. [2022-11-02 20:31:03,184 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 296 transitions, 771 flow [2022-11-02 20:31:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 283.6111111111111) internal successors, (5105), 18 states have internal predecessors, (5105), 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) [2022-11-02 20:31:03,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:03,186 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:03,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:03,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:31:03,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 465601011, now seen corresponding path program 1 times [2022-11-02 20:31:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554483039] [2022-11-02 20:31:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:03,425 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:31:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:03,465 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:31:03,465 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:31:03,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:31:03,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:31:03,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-02 20:31:03,466 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:31:03,466 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:31:03,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-02 20:31:03,513 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-02 20:31:03,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 388 transitions, 896 flow [2022-11-02 20:31:05,325 INFO L130 PetriNetUnfolder]: 1117/5237 cut-off events. [2022-11-02 20:31:05,325 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-02 20:31:05,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6322 conditions, 5237 events. 1117/5237 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 42260 event pairs, 522 based on Foata normal form. 0/4623 useless extension candidates. Maximal degree in co-relation 3281. Up to 1024 conditions per place. [2022-11-02 20:31:05,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 388 transitions, 896 flow [2022-11-02 20:31:05,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 388 transitions, 896 flow [2022-11-02 20:31:05,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:05,567 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:05,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:31:05,577 INFO L130 PetriNetUnfolder]: 4/93 cut-off events. [2022-11-02 20:31:05,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:31:05,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:05,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:05,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -878317687, now seen corresponding path program 1 times [2022-11-02 20:31:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352501058] [2022-11-02 20:31:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:05,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:05,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352501058] [2022-11-02 20:31:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352501058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:05,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:05,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:31:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170220602] [2022-11-02 20:31:05,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:05,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:31:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:31:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:31:05,606 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 388 [2022-11-02 20:31:05,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 388 transitions, 896 flow. Second operand has 2 states, 2 states have (on average 318.5) internal successors, (637), 2 states have internal predecessors, (637), 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) [2022-11-02 20:31:05,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:05,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 388 [2022-11-02 20:31:05,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:07,444 INFO L130 PetriNetUnfolder]: 777/4888 cut-off events. [2022-11-02 20:31:07,444 INFO L131 PetriNetUnfolder]: For 3223/3255 co-relation queries the response was YES. [2022-11-02 20:31:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7006 conditions, 4888 events. 777/4888 cut-off events. For 3223/3255 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40721 event pairs, 522 based on Foata normal form. 6564/11178 useless extension candidates. Maximal degree in co-relation 3526. Up to 1033 conditions per place. [2022-11-02 20:31:07,497 INFO L137 encePairwiseOnDemand]: 335/388 looper letters, 8 selfloop transitions, 0 changer transitions 28/334 dead transitions. [2022-11-02 20:31:07,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 334 transitions, 820 flow [2022-11-02 20:31:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:31:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:31:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 705 transitions. [2022-11-02 20:31:07,500 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9085051546391752 [2022-11-02 20:31:07,500 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 705 transitions. [2022-11-02 20:31:07,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 705 transitions. [2022-11-02 20:31:07,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:07,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 705 transitions. [2022-11-02 20:31:07,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 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) [2022-11-02 20:31:07,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 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) [2022-11-02 20:31:07,503 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 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) [2022-11-02 20:31:07,503 INFO L175 Difference]: Start difference. First operand has 344 places, 388 transitions, 896 flow. Second operand 2 states and 705 transitions. [2022-11-02 20:31:07,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 334 transitions, 820 flow [2022-11-02 20:31:07,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 334 transitions, 820 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:31:07,510 INFO L231 Difference]: Finished difference. Result has 344 places, 306 transitions, 708 flow [2022-11-02 20:31:07,511 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=708, PETRI_PLACES=344, PETRI_TRANSITIONS=306} [2022-11-02 20:31:07,511 INFO L287 CegarLoopForPetriNet]: 344 programPoint places, 0 predicate places. [2022-11-02 20:31:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 306 transitions, 708 flow [2022-11-02 20:31:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 318.5) internal successors, (637), 2 states have internal predecessors, (637), 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) [2022-11-02 20:31:07,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:07,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:07,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-02 20:31:07,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1171720694, now seen corresponding path program 1 times [2022-11-02 20:31:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:07,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440520336] [2022-11-02 20:31:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:07,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440520336] [2022-11-02 20:31:07,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440520336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:07,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:07,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:31:07,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652315942] [2022-11-02 20:31:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:07,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:31:07,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:31:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:31:07,551 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 388 [2022-11-02 20:31:07,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 306 transitions, 708 flow. Second operand has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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) [2022-11-02 20:31:07,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:07,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 388 [2022-11-02 20:31:07,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:07,808 INFO L130 PetriNetUnfolder]: 0/464 cut-off events. [2022-11-02 20:31:07,808 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:31:07,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 464 events. 0/464 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1476 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-02 20:31:07,809 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 17 selfloop transitions, 2 changer transitions 0/310 dead transitions. [2022-11-02 20:31:07,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 310 transitions, 754 flow [2022-11-02 20:31:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:31:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:31:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-11-02 20:31:07,811 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8187285223367697 [2022-11-02 20:31:07,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-11-02 20:31:07,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-11-02 20:31:07,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:07,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-11-02 20:31:07,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 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) [2022-11-02 20:31:07,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-02 20:31:07,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-02 20:31:07,815 INFO L175 Difference]: Start difference. First operand has 344 places, 306 transitions, 708 flow. Second operand 3 states and 953 transitions. [2022-11-02 20:31:07,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 310 transitions, 754 flow [2022-11-02 20:31:07,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 310 transitions, 698 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-02 20:31:07,821 INFO L231 Difference]: Finished difference. Result has 327 places, 307 transitions, 664 flow [2022-11-02 20:31:07,821 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=664, PETRI_PLACES=327, PETRI_TRANSITIONS=307} [2022-11-02 20:31:07,822 INFO L287 CegarLoopForPetriNet]: 344 programPoint places, -17 predicate places. [2022-11-02 20:31:07,822 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 307 transitions, 664 flow [2022-11-02 20:31:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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) [2022-11-02 20:31:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:07,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:07,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:31:07,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1952625124, now seen corresponding path program 1 times [2022-11-02 20:31:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778492603] [2022-11-02 20:31:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:07,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778492603] [2022-11-02 20:31:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778492603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808499962] [2022-11-02 20:31:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:07,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:07,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:31:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:08,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:31:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:08,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808499962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:08,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:08,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:31:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910314782] [2022-11-02 20:31:08,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:31:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:31:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:31:08,144 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-11-02 20:31:08,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 307 transitions, 664 flow. Second operand has 10 states, 10 states have (on average 312.3) internal successors, (3123), 10 states have internal predecessors, (3123), 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) [2022-11-02 20:31:08,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:08,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-11-02 20:31:08,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:08,336 INFO L130 PetriNetUnfolder]: 0/438 cut-off events. [2022-11-02 20:31:08,336 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:31:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 438 events. 0/438 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1313 event pairs, 0 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:31:08,337 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 18 selfloop transitions, 9 changer transitions 0/317 dead transitions. [2022-11-02 20:31:08,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 317 transitions, 740 flow [2022-11-02 20:31:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2819 transitions. [2022-11-02 20:31:08,342 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8072737686139748 [2022-11-02 20:31:08,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2819 transitions. [2022-11-02 20:31:08,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2819 transitions. [2022-11-02 20:31:08,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:08,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2819 transitions. [2022-11-02 20:31:08,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 313.22222222222223) internal successors, (2819), 9 states have internal predecessors, (2819), 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) [2022-11-02 20:31:08,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 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) [2022-11-02 20:31:08,354 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 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) [2022-11-02 20:31:08,354 INFO L175 Difference]: Start difference. First operand has 327 places, 307 transitions, 664 flow. Second operand 9 states and 2819 transitions. [2022-11-02 20:31:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 317 transitions, 740 flow [2022-11-02 20:31:08,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 317 transitions, 738 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:08,361 INFO L231 Difference]: Finished difference. Result has 337 places, 313 transitions, 712 flow [2022-11-02 20:31:08,362 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=712, PETRI_PLACES=337, PETRI_TRANSITIONS=313} [2022-11-02 20:31:08,363 INFO L287 CegarLoopForPetriNet]: 344 programPoint places, -7 predicate places. [2022-11-02 20:31:08,363 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 313 transitions, 712 flow [2022-11-02 20:31:08,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 312.3) internal successors, (3123), 10 states have internal predecessors, (3123), 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) [2022-11-02 20:31:08,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:08,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:08,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-02 20:31:08,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:08,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash -224208869, now seen corresponding path program 1 times [2022-11-02 20:31:08,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:08,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695249689] [2022-11-02 20:31:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:08,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695249689] [2022-11-02 20:31:08,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695249689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715154878] [2022-11-02 20:31:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:08,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:08,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:08,753 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:08,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:31:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:31:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715154878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:09,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:09,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:31:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732432896] [2022-11-02 20:31:09,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:31:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:31:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:31:09,136 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-11-02 20:31:09,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 313 transitions, 712 flow. Second operand has 18 states, 18 states have (on average 312.6111111111111) internal successors, (5627), 18 states have internal predecessors, (5627), 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) [2022-11-02 20:31:09,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:09,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-11-02 20:31:09,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:09,449 INFO L130 PetriNetUnfolder]: 0/386 cut-off events. [2022-11-02 20:31:09,450 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-02 20:31:09,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 386 events. 0/386 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 948 event pairs, 0 based on Foata normal form. 4/390 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:31:09,451 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 26 selfloop transitions, 21 changer transitions 0/337 dead transitions. [2022-11-02 20:31:09,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 337 transitions, 914 flow [2022-11-02 20:31:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:31:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6561 transitions. [2022-11-02 20:31:09,459 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8052282768777614 [2022-11-02 20:31:09,460 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6561 transitions. [2022-11-02 20:31:09,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6561 transitions. [2022-11-02 20:31:09,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:09,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6561 transitions. [2022-11-02 20:31:09,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 312.42857142857144) internal successors, (6561), 21 states have internal predecessors, (6561), 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) [2022-11-02 20:31:09,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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) [2022-11-02 20:31:09,486 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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) [2022-11-02 20:31:09,487 INFO L175 Difference]: Start difference. First operand has 337 places, 313 transitions, 712 flow. Second operand 21 states and 6561 transitions. [2022-11-02 20:31:09,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 337 transitions, 914 flow [2022-11-02 20:31:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 337 transitions, 900 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:09,494 INFO L231 Difference]: Finished difference. Result has 361 places, 326 transitions, 836 flow [2022-11-02 20:31:09,494 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=836, PETRI_PLACES=361, PETRI_TRANSITIONS=326} [2022-11-02 20:31:09,495 INFO L287 CegarLoopForPetriNet]: 344 programPoint places, 17 predicate places. [2022-11-02 20:31:09,495 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 326 transitions, 836 flow [2022-11-02 20:31:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 312.6111111111111) internal successors, (5627), 18 states have internal predecessors, (5627), 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) [2022-11-02 20:31:09,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:09,498 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:09,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:09,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -499491947, now seen corresponding path program 1 times [2022-11-02 20:31:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089183857] [2022-11-02 20:31:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089183857] [2022-11-02 20:31:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089183857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676938093] [2022-11-02 20:31:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:10,089 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:10,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:31:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:31:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676938093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:10,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:10,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:31:10,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086556190] [2022-11-02 20:31:10,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:31:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:31:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:31:10,864 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-11-02 20:31:10,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 326 transitions, 836 flow. Second operand has 34 states, 34 states have (on average 312.79411764705884) internal successors, (10635), 34 states have internal predecessors, (10635), 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) [2022-11-02 20:31:10,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:10,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-11-02 20:31:10,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:11,361 INFO L130 PetriNetUnfolder]: 0/360 cut-off events. [2022-11-02 20:31:11,362 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-02 20:31:11,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 360 events. 0/360 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 793 event pairs, 0 based on Foata normal form. 2/362 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:31:11,363 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 27 selfloop transitions, 25 changer transitions 0/330 dead transitions. [2022-11-02 20:31:11,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 980 flow [2022-11-02 20:31:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:31:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-02 20:31:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 8424 transitions. [2022-11-02 20:31:11,378 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8041237113402062 [2022-11-02 20:31:11,378 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 8424 transitions. [2022-11-02 20:31:11,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 8424 transitions. [2022-11-02 20:31:11,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:11,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 8424 transitions. [2022-11-02 20:31:11,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 312.0) internal successors, (8424), 27 states have internal predecessors, (8424), 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) [2022-11-02 20:31:11,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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) [2022-11-02 20:31:11,416 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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) [2022-11-02 20:31:11,416 INFO L175 Difference]: Start difference. First operand has 361 places, 326 transitions, 836 flow. Second operand 27 states and 8424 transitions. [2022-11-02 20:31:11,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 980 flow [2022-11-02 20:31:11,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 926 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-02 20:31:11,425 INFO L231 Difference]: Finished difference. Result has 361 places, 316 transitions, 819 flow [2022-11-02 20:31:11,426 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=819, PETRI_PLACES=361, PETRI_TRANSITIONS=316} [2022-11-02 20:31:11,427 INFO L287 CegarLoopForPetriNet]: 344 programPoint places, 17 predicate places. [2022-11-02 20:31:11,427 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 316 transitions, 819 flow [2022-11-02 20:31:11,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 312.79411764705884) internal successors, (10635), 34 states have internal predecessors, (10635), 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) [2022-11-02 20:31:11,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:11,429 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:11,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:31:11,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash -356466964, now seen corresponding path program 1 times [2022-11-02 20:31:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:11,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580973788] [2022-11-02 20:31:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:11,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:31:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:11,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:31:11,727 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:31:11,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:31:11,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:31:11,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-02 20:31:11,728 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:31:11,730 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:31:11,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-02 20:31:11,785 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-02 20:31:11,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 425 transitions, 994 flow [2022-11-02 20:31:15,624 INFO L130 PetriNetUnfolder]: 2408/10171 cut-off events. [2022-11-02 20:31:15,624 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-02 20:31:15,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12548 conditions, 10171 events. 2408/10171 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 94519 event pairs, 1291 based on Foata normal form. 0/9033 useless extension candidates. Maximal degree in co-relation 6304. Up to 2304 conditions per place. [2022-11-02 20:31:15,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 425 transitions, 994 flow [2022-11-02 20:31:16,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 425 transitions, 994 flow [2022-11-02 20:31:16,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:16,065 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:16,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:31:16,071 INFO L130 PetriNetUnfolder]: 4/96 cut-off events. [2022-11-02 20:31:16,071 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:31:16,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:16,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:16,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2033153418, now seen corresponding path program 1 times [2022-11-02 20:31:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:16,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011098979] [2022-11-02 20:31:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011098979] [2022-11-02 20:31:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011098979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:16,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:16,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:31:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885027] [2022-11-02 20:31:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:31:16,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:31:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:31:16,108 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 425 [2022-11-02 20:31:16,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 425 transitions, 994 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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) [2022-11-02 20:31:16,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:16,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 425 [2022-11-02 20:31:16,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:19,546 INFO L130 PetriNetUnfolder]: 1801/9535 cut-off events. [2022-11-02 20:31:19,546 INFO L131 PetriNetUnfolder]: For 7102/7322 co-relation queries the response was YES. [2022-11-02 20:31:19,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14275 conditions, 9535 events. 1801/9535 cut-off events. For 7102/7322 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 91518 event pairs, 1291 based on Foata normal form. 15484/24489 useless extension candidates. Maximal degree in co-relation 7012. Up to 2358 conditions per place. [2022-11-02 20:31:19,743 INFO L137 encePairwiseOnDemand]: 363/425 looper letters, 18 selfloop transitions, 2 changer transitions 29/369 dead transitions. [2022-11-02 20:31:19,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 369 transitions, 940 flow [2022-11-02 20:31:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:31:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:31:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2022-11-02 20:31:19,746 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8752941176470588 [2022-11-02 20:31:19,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2022-11-02 20:31:19,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2022-11-02 20:31:19,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:19,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2022-11-02 20:31:19,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 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) [2022-11-02 20:31:19,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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) [2022-11-02 20:31:19,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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) [2022-11-02 20:31:19,752 INFO L175 Difference]: Start difference. First operand has 376 places, 425 transitions, 994 flow. Second operand 3 states and 1116 transitions. [2022-11-02 20:31:19,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 369 transitions, 940 flow [2022-11-02 20:31:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 369 transitions, 940 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:31:19,762 INFO L231 Difference]: Finished difference. Result has 378 places, 337 transitions, 801 flow [2022-11-02 20:31:19,762 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=801, PETRI_PLACES=378, PETRI_TRANSITIONS=337} [2022-11-02 20:31:19,763 INFO L287 CegarLoopForPetriNet]: 376 programPoint places, 2 predicate places. [2022-11-02 20:31:19,763 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 337 transitions, 801 flow [2022-11-02 20:31:19,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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) [2022-11-02 20:31:19,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:19,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:19,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-02 20:31:19,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1858574233, now seen corresponding path program 1 times [2022-11-02 20:31:19,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:19,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015117529] [2022-11-02 20:31:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:19,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:19,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015117529] [2022-11-02 20:31:19,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015117529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826101952] [2022-11-02 20:31:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:19,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:19,827 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:19,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:31:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:31:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826101952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:20,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:20,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:31:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674854217] [2022-11-02 20:31:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:20,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:31:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:31:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:31:20,110 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-11-02 20:31:20,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 337 transitions, 801 flow. Second operand has 10 states, 10 states have (on average 341.3) internal successors, (3413), 10 states have internal predecessors, (3413), 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) [2022-11-02 20:31:20,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:20,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-11-02 20:31:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:20,337 INFO L130 PetriNetUnfolder]: 0/490 cut-off events. [2022-11-02 20:31:20,337 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-02 20:31:20,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 490 events. 0/490 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1513 event pairs, 0 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:31:20,338 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 19 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-11-02 20:31:20,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 347 transitions, 879 flow [2022-11-02 20:31:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3081 transitions. [2022-11-02 20:31:20,345 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8054901960784314 [2022-11-02 20:31:20,345 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3081 transitions. [2022-11-02 20:31:20,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3081 transitions. [2022-11-02 20:31:20,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:20,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3081 transitions. [2022-11-02 20:31:20,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 342.3333333333333) internal successors, (3081), 9 states have internal predecessors, (3081), 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) [2022-11-02 20:31:20,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 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) [2022-11-02 20:31:20,485 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 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) [2022-11-02 20:31:20,486 INFO L175 Difference]: Start difference. First operand has 378 places, 337 transitions, 801 flow. Second operand 9 states and 3081 transitions. [2022-11-02 20:31:20,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 347 transitions, 879 flow [2022-11-02 20:31:20,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 347 transitions, 805 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:20,495 INFO L231 Difference]: Finished difference. Result has 368 places, 343 transitions, 777 flow [2022-11-02 20:31:20,495 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=368, PETRI_TRANSITIONS=343} [2022-11-02 20:31:20,496 INFO L287 CegarLoopForPetriNet]: 376 programPoint places, -8 predicate places. [2022-11-02 20:31:20,496 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 343 transitions, 777 flow [2022-11-02 20:31:20,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.3) internal successors, (3413), 10 states have internal predecessors, (3413), 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) [2022-11-02 20:31:20,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:20,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:20,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:20,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash -92949148, now seen corresponding path program 1 times [2022-11-02 20:31:20,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:20,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464825503] [2022-11-02 20:31:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464825503] [2022-11-02 20:31:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464825503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482709870] [2022-11-02 20:31:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:20,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:20,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:31:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:31:21,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:21,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:21,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482709870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:21,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:21,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:31:21,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388994140] [2022-11-02 20:31:21,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:31:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:31:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:31:21,300 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-11-02 20:31:21,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 343 transitions, 777 flow. Second operand has 18 states, 18 states have (on average 341.6111111111111) internal successors, (6149), 18 states have internal predecessors, (6149), 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) [2022-11-02 20:31:21,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:21,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-11-02 20:31:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:21,726 INFO L130 PetriNetUnfolder]: 0/438 cut-off events. [2022-11-02 20:31:21,726 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-02 20:31:21,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 438 events. 0/438 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1156 event pairs, 0 based on Foata normal form. 4/442 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:31:21,728 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 27 selfloop transitions, 21 changer transitions 0/367 dead transitions. [2022-11-02 20:31:21,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 367 transitions, 981 flow [2022-11-02 20:31:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:31:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7171 transitions. [2022-11-02 20:31:21,740 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8034733893557423 [2022-11-02 20:31:21,740 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7171 transitions. [2022-11-02 20:31:21,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7171 transitions. [2022-11-02 20:31:21,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:21,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7171 transitions. [2022-11-02 20:31:21,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 341.4761904761905) internal successors, (7171), 21 states have internal predecessors, (7171), 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) [2022-11-02 20:31:21,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 425.0) internal successors, (9350), 22 states have internal predecessors, (9350), 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) [2022-11-02 20:31:21,770 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 425.0) internal successors, (9350), 22 states have internal predecessors, (9350), 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) [2022-11-02 20:31:21,770 INFO L175 Difference]: Start difference. First operand has 368 places, 343 transitions, 777 flow. Second operand 21 states and 7171 transitions. [2022-11-02 20:31:21,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 367 transitions, 981 flow [2022-11-02 20:31:21,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 367 transitions, 967 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:21,780 INFO L231 Difference]: Finished difference. Result has 392 places, 356 transitions, 901 flow [2022-11-02 20:31:21,780 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=901, PETRI_PLACES=392, PETRI_TRANSITIONS=356} [2022-11-02 20:31:21,781 INFO L287 CegarLoopForPetriNet]: 376 programPoint places, 16 predicate places. [2022-11-02 20:31:21,781 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 356 transitions, 901 flow [2022-11-02 20:31:21,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 341.6111111111111) internal successors, (6149), 18 states have internal predecessors, (6149), 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) [2022-11-02 20:31:21,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:21,783 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:21,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-02 20:31:22,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:31:22,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:22,009 INFO L85 PathProgramCache]: Analyzing trace with hash -611735190, now seen corresponding path program 1 times [2022-11-02 20:31:22,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:22,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353575095] [2022-11-02 20:31:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353575095] [2022-11-02 20:31:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353575095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613773004] [2022-11-02 20:31:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:22,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:22,436 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:31:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:31:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:23,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613773004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:23,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:23,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:31:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600599457] [2022-11-02 20:31:23,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:23,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:31:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:31:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:31:23,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-11-02 20:31:23,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 356 transitions, 901 flow. Second operand has 34 states, 34 states have (on average 341.79411764705884) internal successors, (11621), 34 states have internal predecessors, (11621), 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) [2022-11-02 20:31:23,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:23,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-11-02 20:31:23,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:23,804 INFO L130 PetriNetUnfolder]: 0/399 cut-off events. [2022-11-02 20:31:23,804 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-02 20:31:23,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 399 events. 0/399 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 909 event pairs, 0 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:31:23,805 INFO L137 encePairwiseOnDemand]: 420/425 looper letters, 30 selfloop transitions, 28 changer transitions 0/365 dead transitions. [2022-11-02 20:31:23,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 365 transitions, 1091 flow [2022-11-02 20:31:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:31:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:31:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10231 transitions. [2022-11-02 20:31:23,816 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8024313725490196 [2022-11-02 20:31:23,816 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10231 transitions. [2022-11-02 20:31:23,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10231 transitions. [2022-11-02 20:31:23,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:23,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10231 transitions. [2022-11-02 20:31:23,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 341.03333333333336) internal successors, (10231), 30 states have internal predecessors, (10231), 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) [2022-11-02 20:31:23,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 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) [2022-11-02 20:31:23,847 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 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) [2022-11-02 20:31:23,848 INFO L175 Difference]: Start difference. First operand has 392 places, 356 transitions, 901 flow. Second operand 30 states and 10231 transitions. [2022-11-02 20:31:23,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 365 transitions, 1091 flow [2022-11-02 20:31:23,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 365 transitions, 1031 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-02 20:31:23,856 INFO L231 Difference]: Finished difference. Result has 395 places, 349 transitions, 908 flow [2022-11-02 20:31:23,856 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=908, PETRI_PLACES=395, PETRI_TRANSITIONS=349} [2022-11-02 20:31:23,857 INFO L287 CegarLoopForPetriNet]: 376 programPoint places, 19 predicate places. [2022-11-02 20:31:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 349 transitions, 908 flow [2022-11-02 20:31:23,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 341.79411764705884) internal successors, (11621), 34 states have internal predecessors, (11621), 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) [2022-11-02 20:31:23,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:23,859 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:23,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:24,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:24,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:24,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1827515892, now seen corresponding path program 1 times [2022-11-02 20:31:24,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:24,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713501681] [2022-11-02 20:31:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:24,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:24,106 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:31:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:24,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:31:24,146 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:31:24,146 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:31:24,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:31:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-02 20:31:24,147 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:31:24,147 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:31:24,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-02 20:31:24,192 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-02 20:31:24,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 408 places, 462 transitions, 1094 flow [2022-11-02 20:31:31,078 INFO L130 PetriNetUnfolder]: 5235/20225 cut-off events. [2022-11-02 20:31:31,078 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-02 20:31:32,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25431 conditions, 20225 events. 5235/20225 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 215029 event pairs, 3084 based on Foata normal form. 0/18051 useless extension candidates. Maximal degree in co-relation 12528. Up to 5120 conditions per place. [2022-11-02 20:31:32,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 408 places, 462 transitions, 1094 flow [2022-11-02 20:31:32,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 408 places, 462 transitions, 1094 flow [2022-11-02 20:31:32,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:31:32,530 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e08501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:31:32,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:31:32,540 INFO L130 PetriNetUnfolder]: 4/96 cut-off events. [2022-11-02 20:31:32,540 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:31:32,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:32,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:32,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 575301258, now seen corresponding path program 1 times [2022-11-02 20:31:32,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:32,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858445564] [2022-11-02 20:31:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:32,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858445564] [2022-11-02 20:31:32,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858445564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:31:32,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:31:32,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:31:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157174745] [2022-11-02 20:31:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:31:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:31:32,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:31:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:31:32,608 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 462 [2022-11-02 20:31:32,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 462 transitions, 1094 flow. Second operand has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 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) [2022-11-02 20:31:32,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:32,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 462 [2022-11-02 20:31:32,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:40,470 INFO L130 PetriNetUnfolder]: 4106/19066 cut-off events. [2022-11-02 20:31:40,470 INFO L131 PetriNetUnfolder]: For 15673/16041 co-relation queries the response was YES. [2022-11-02 20:31:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29457 conditions, 19066 events. 4106/19066 cut-off events. For 15673/16041 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 206175 event pairs, 3084 based on Foata normal form. 33193/51215 useless extension candidates. Maximal degree in co-relation 14257. Up to 5180 conditions per place. [2022-11-02 20:31:41,056 INFO L137 encePairwiseOnDemand]: 394/462 looper letters, 19 selfloop transitions, 2 changer transitions 30/400 dead transitions. [2022-11-02 20:31:41,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 400 transitions, 1032 flow [2022-11-02 20:31:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:31:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:31:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1211 transitions. [2022-11-02 20:31:41,058 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-11-02 20:31:41,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1211 transitions. [2022-11-02 20:31:41,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1211 transitions. [2022-11-02 20:31:41,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:41,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1211 transitions. [2022-11-02 20:31:41,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.6666666666667) internal successors, (1211), 3 states have internal predecessors, (1211), 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) [2022-11-02 20:31:41,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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) [2022-11-02 20:31:41,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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) [2022-11-02 20:31:41,062 INFO L175 Difference]: Start difference. First operand has 408 places, 462 transitions, 1094 flow. Second operand 3 states and 1211 transitions. [2022-11-02 20:31:41,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 400 transitions, 1032 flow [2022-11-02 20:31:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 400 transitions, 1032 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:31:41,080 INFO L231 Difference]: Finished difference. Result has 410 places, 367 transitions, 884 flow [2022-11-02 20:31:41,081 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=884, PETRI_PLACES=410, PETRI_TRANSITIONS=367} [2022-11-02 20:31:41,082 INFO L287 CegarLoopForPetriNet]: 408 programPoint places, 2 predicate places. [2022-11-02 20:31:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 367 transitions, 884 flow [2022-11-02 20:31:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 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) [2022-11-02 20:31:41,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:41,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-02 20:31:41,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 452212618, now seen corresponding path program 1 times [2022-11-02 20:31:41,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:41,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525167896] [2022-11-02 20:31:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525167896] [2022-11-02 20:31:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525167896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146654707] [2022-11-02 20:31:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:41,157 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:41,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:31:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:31:41,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:41,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146654707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:41,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:41,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:31:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691606340] [2022-11-02 20:31:41,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:41,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:31:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:31:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:31:41,485 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-11-02 20:31:41,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 367 transitions, 884 flow. Second operand has 10 states, 10 states have (on average 370.3) internal successors, (3703), 10 states have internal predecessors, (3703), 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) [2022-11-02 20:31:41,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:41,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-11-02 20:31:41,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:41,790 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-02 20:31:41,790 INFO L131 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-11-02 20:31:41,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 542 events. 0/542 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1722 event pairs, 0 based on Foata normal form. 2/544 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:31:41,792 INFO L137 encePairwiseOnDemand]: 456/462 looper letters, 20 selfloop transitions, 9 changer transitions 0/377 dead transitions. [2022-11-02 20:31:41,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 377 transitions, 964 flow [2022-11-02 20:31:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:31:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:31:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3343 transitions. [2022-11-02 20:31:41,797 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.803992303992304 [2022-11-02 20:31:41,797 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3343 transitions. [2022-11-02 20:31:41,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3343 transitions. [2022-11-02 20:31:41,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:41,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3343 transitions. [2022-11-02 20:31:41,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 371.44444444444446) internal successors, (3343), 9 states have internal predecessors, (3343), 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) [2022-11-02 20:31:41,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 462.0) internal successors, (4620), 10 states have internal predecessors, (4620), 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) [2022-11-02 20:31:41,814 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 462.0) internal successors, (4620), 10 states have internal predecessors, (4620), 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) [2022-11-02 20:31:41,814 INFO L175 Difference]: Start difference. First operand has 410 places, 367 transitions, 884 flow. Second operand 9 states and 3343 transitions. [2022-11-02 20:31:41,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 377 transitions, 964 flow [2022-11-02 20:31:41,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 377 transitions, 872 flow, removed 45 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:41,826 INFO L231 Difference]: Finished difference. Result has 400 places, 373 transitions, 842 flow [2022-11-02 20:31:41,827 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=400, PETRI_TRANSITIONS=373} [2022-11-02 20:31:41,828 INFO L287 CegarLoopForPetriNet]: 408 programPoint places, -8 predicate places. [2022-11-02 20:31:41,828 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 373 transitions, 842 flow [2022-11-02 20:31:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 370.3) internal successors, (3703), 10 states have internal predecessors, (3703), 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) [2022-11-02 20:31:41,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:41,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:41,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:42,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:31:42,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2039005581, now seen corresponding path program 1 times [2022-11-02 20:31:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883279742] [2022-11-02 20:31:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:42,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883279742] [2022-11-02 20:31:42,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883279742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546180714] [2022-11-02 20:31:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:42,170 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:42,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:31:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:31:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:42,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:42,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546180714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:42,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:42,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:31:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341528104] [2022-11-02 20:31:42,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:31:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:31:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:31:42,602 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-11-02 20:31:42,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 373 transitions, 842 flow. Second operand has 18 states, 18 states have (on average 370.6111111111111) internal successors, (6671), 18 states have internal predecessors, (6671), 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) [2022-11-02 20:31:42,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:42,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-11-02 20:31:42,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:42,961 INFO L130 PetriNetUnfolder]: 0/490 cut-off events. [2022-11-02 20:31:42,961 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-02 20:31:42,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 490 events. 0/490 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1357 event pairs, 0 based on Foata normal form. 4/494 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:31:42,963 INFO L137 encePairwiseOnDemand]: 456/462 looper letters, 28 selfloop transitions, 21 changer transitions 0/397 dead transitions. [2022-11-02 20:31:42,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 397 transitions, 1048 flow [2022-11-02 20:31:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:31:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7781 transitions. [2022-11-02 20:31:42,971 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8019995877138735 [2022-11-02 20:31:42,971 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7781 transitions. [2022-11-02 20:31:42,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7781 transitions. [2022-11-02 20:31:42,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:42,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7781 transitions. [2022-11-02 20:31:42,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 370.5238095238095) internal successors, (7781), 21 states have internal predecessors, (7781), 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) [2022-11-02 20:31:42,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 462.0) internal successors, (10164), 22 states have internal predecessors, (10164), 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) [2022-11-02 20:31:42,994 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 462.0) internal successors, (10164), 22 states have internal predecessors, (10164), 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) [2022-11-02 20:31:42,995 INFO L175 Difference]: Start difference. First operand has 400 places, 373 transitions, 842 flow. Second operand 21 states and 7781 transitions. [2022-11-02 20:31:42,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 397 transitions, 1048 flow [2022-11-02 20:31:42,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 397 transitions, 1034 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:31:43,004 INFO L231 Difference]: Finished difference. Result has 424 places, 386 transitions, 966 flow [2022-11-02 20:31:43,005 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=966, PETRI_PLACES=424, PETRI_TRANSITIONS=386} [2022-11-02 20:31:43,005 INFO L287 CegarLoopForPetriNet]: 408 programPoint places, 16 predicate places. [2022-11-02 20:31:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 386 transitions, 966 flow [2022-11-02 20:31:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 370.6111111111111) internal successors, (6671), 18 states have internal predecessors, (6671), 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) [2022-11-02 20:31:43,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:43,007 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:43,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:43,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 81818271, now seen corresponding path program 1 times [2022-11-02 20:31:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:43,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313647630] [2022-11-02 20:31:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:43,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313647630] [2022-11-02 20:31:43,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313647630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264361193] [2022-11-02 20:31:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:43,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:43,757 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:43,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:31:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:31:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:44,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:31:44,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264361193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:44,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:44,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:31:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004103491] [2022-11-02 20:31:44,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:44,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:31:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:31:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:31:44,600 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-11-02 20:31:44,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 386 transitions, 966 flow. Second operand has 34 states, 34 states have (on average 370.79411764705884) internal successors, (12607), 34 states have internal predecessors, (12607), 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) [2022-11-02 20:31:44,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:31:44,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-11-02 20:31:44,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:31:45,208 INFO L130 PetriNetUnfolder]: 0/438 cut-off events. [2022-11-02 20:31:45,209 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-02 20:31:45,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 438 events. 0/438 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1025 event pairs, 0 based on Foata normal form. 4/442 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-02 20:31:45,210 INFO L137 encePairwiseOnDemand]: 457/462 looper letters, 33 selfloop transitions, 31 changer transitions 0/400 dead transitions. [2022-11-02 20:31:45,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 400 transitions, 1202 flow [2022-11-02 20:31:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:31:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:31:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 12212 transitions. [2022-11-02 20:31:45,228 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8009969828151646 [2022-11-02 20:31:45,229 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 12212 transitions. [2022-11-02 20:31:45,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 12212 transitions. [2022-11-02 20:31:45,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:31:45,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 12212 transitions. [2022-11-02 20:31:45,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 370.06060606060606) internal successors, (12212), 33 states have internal predecessors, (12212), 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) [2022-11-02 20:31:45,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 462.0) internal successors, (15708), 34 states have internal predecessors, (15708), 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) [2022-11-02 20:31:45,271 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 462.0) internal successors, (15708), 34 states have internal predecessors, (15708), 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) [2022-11-02 20:31:45,271 INFO L175 Difference]: Start difference. First operand has 424 places, 386 transitions, 966 flow. Second operand 33 states and 12212 transitions. [2022-11-02 20:31:45,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 400 transitions, 1202 flow [2022-11-02 20:31:45,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 400 transitions, 1136 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-02 20:31:45,282 INFO L231 Difference]: Finished difference. Result has 430 places, 382 transitions, 997 flow [2022-11-02 20:31:45,282 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=997, PETRI_PLACES=430, PETRI_TRANSITIONS=382} [2022-11-02 20:31:45,283 INFO L287 CegarLoopForPetriNet]: 408 programPoint places, 22 predicate places. [2022-11-02 20:31:45,283 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 382 transitions, 997 flow [2022-11-02 20:31:45,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 370.79411764705884) internal successors, (12607), 34 states have internal predecessors, (12607), 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) [2022-11-02 20:31:45,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:31:45,286 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:45,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c1f3d2e-ef4e-4620-91ef-855c2f6a11c7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-02 20:31:45,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:31:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2034615245, now seen corresponding path program 1 times [2022-11-02 20:31:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:45,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703680610] [2022-11-02 20:31:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:45,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:31:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:31:45,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:31:45,587 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:31:45,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:31:45,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:31:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-02 20:31:45,588 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:31:45,589 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:31:45,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-02 20:31:45,658 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-02 20:31:45,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 499 transitions, 1196 flow