./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R --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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- 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-38b53e6 [2022-11-25 17:46:54,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:46:54,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:46:54,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:46:54,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:46:54,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:46:54,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:46:54,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:46:54,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:46:54,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:46:54,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:46:54,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:46:54,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:46:54,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:46:54,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:46:54,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:46:54,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:46:54,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:46:54,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:46:54,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:46:54,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:46:54,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:46:54,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:46:54,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:46:54,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:46:54,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:46:54,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:46:54,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:46:54,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:46:54,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:46:54,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:46:54,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:46:54,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:46:54,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:46:54,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:46:54,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:46:54,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:46:54,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:46:54,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:46:54,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:46:54,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:46:54,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:46:54,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:46:54,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:46:54,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:46:54,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:46:54,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:46:54,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:46:54,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:46:54,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:46:54,348 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:46:54,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:46:54,349 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:46:54,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:46:54,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:46:54,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:46:54,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:46:54,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:46:54,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:46:54,351 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:46:54,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:46:54,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:46:54,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:46:54,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:46:54,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:46:54,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:46:54,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:54,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:46:54,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:46:54,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:46:54,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:46:54,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:46:54,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:46:54,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:46:54,356 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:46:54,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:46:54,356 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2022-11-25 17:46:54,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:46:54,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:46:54,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:46:54,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:46:54,751 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:46:54,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-25 17:46:57,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:46:58,110 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:46:58,123 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-25 17:46:58,177 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/data/0c3c0679d/570835bc0feb45e4a8c0cd59aacec6ca/FLAG7059d5a2f [2022-11-25 17:46:58,210 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/data/0c3c0679d/570835bc0feb45e4a8c0cd59aacec6ca [2022-11-25 17:46:58,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:46:58,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:46:58,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:58,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:46:58,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:46:58,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:58" (1/1) ... [2022-11-25 17:46:58,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68f789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:58, skipping insertion in model container [2022-11-25 17:46:58,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:58" (1/1) ... [2022-11-25 17:46:58,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:46:58,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:46:58,940 WARN L237 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_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-25 17:46:58,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:59,013 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:46:59,076 WARN L237 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_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-25 17:46:59,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:59,172 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:46:59,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59 WrapperNode [2022-11-25 17:46:59,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:59,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:59,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:46:59,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:46:59,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,266 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-25 17:46:59,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:59,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:46:59,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:46:59,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:46:59,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:46:59,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:46:59,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:46:59,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:46:59,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (1/1) ... [2022-11-25 17:46:59,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:59,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:46:59,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:46:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:46:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:46:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:46:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:46:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:46:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:46:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:46:59,437 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:46:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:46:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:46:59,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:46:59,440 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:46:59,691 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:46:59,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:47:00,143 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:47:00,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:47:00,153 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-25 17:47:00,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:00 BoogieIcfgContainer [2022-11-25 17:47:00,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:47:00,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:47:00,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:47:00,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:47:00,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:46:58" (1/3) ... [2022-11-25 17:47:00,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eda455b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:00, skipping insertion in model container [2022-11-25 17:47:00,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:59" (2/3) ... [2022-11-25 17:47:00,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eda455b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:00, skipping insertion in model container [2022-11-25 17:47:00,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:00" (3/3) ... [2022-11-25 17:47:00,166 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2022-11-25 17:47:00,175 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:47:00,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:47:00,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-25 17:47:00,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:47:00,278 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:47:00,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-11-25 17:47:00,469 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-11-25 17:47:00,469 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:47:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1784 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-25 17:47:00,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-11-25 17:47:00,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-11-25 17:47:00,526 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:00,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 250 transitions, 505 flow [2022-11-25 17:47:00,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 250 transitions, 505 flow [2022-11-25 17:47:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 250 transitions, 505 flow [2022-11-25 17:47:00,609 INFO L130 PetriNetUnfolder]: 72/389 cut-off events. [2022-11-25 17:47:00,610 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:00,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 389 events. 72/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1747 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-25 17:47:00,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 20590 [2022-11-25 17:47:05,029 INFO L134 LiptonReduction]: Checked pairs total: 31354 [2022-11-25 17:47:05,029 INFO L136 LiptonReduction]: Total number of compositions: 222 [2022-11-25 17:47:05,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:05,051 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;@2c922e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:05,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:47:05,057 INFO L130 PetriNetUnfolder]: 16/45 cut-off events. [2022-11-25 17:47:05,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:05,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:05,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:05,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:47:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash -499953350, now seen corresponding path program 1 times [2022-11-25 17:47:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316589349] [2022-11-25 17:47:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316589349] [2022-11-25 17:47:05,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316589349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:05,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:05,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:05,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052058151] [2022-11-25 17:47:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:05,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:05,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:05,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 477 [2022-11-25 17:47:05,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 97 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:05,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 477 [2022-11-25 17:47:05,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:05,758 INFO L130 PetriNetUnfolder]: 662/1340 cut-off events. [2022-11-25 17:47:05,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:05,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 1340 events. 662/1340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7387 event pairs, 544 based on Foata normal form. 199/1317 useless extension candidates. Maximal degree in co-relation 2482. Up to 1225 conditions per place. [2022-11-25 17:47:05,768 INFO L137 encePairwiseOnDemand]: 442/477 looper letters, 54 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-11-25 17:47:05,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 249 flow [2022-11-25 17:47:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2022-11-25 17:47:05,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49825296995108315 [2022-11-25 17:47:05,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2022-11-25 17:47:05,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2022-11-25 17:47:05,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:05,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2022-11-25 17:47:05,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,822 INFO L175 Difference]: Start difference. First operand has 63 places, 97 transitions, 199 flow. Second operand 3 states and 713 transitions. [2022-11-25 17:47:05,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 249 flow [2022-11-25 17:47:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 249 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:05,829 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2022-11-25 17:47:05,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=477, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2022-11-25 17:47:05,838 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2022-11-25 17:47:05,839 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2022-11-25 17:47:05,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:05,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:05,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:47:05,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:47:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash 370526552, now seen corresponding path program 1 times [2022-11-25 17:47:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811278698] [2022-11-25 17:47:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:05,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:05,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811278698] [2022-11-25 17:47:05,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811278698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:05,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:05,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521227255] [2022-11-25 17:47:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:05,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:05,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 477 [2022-11-25 17:47:05,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:05,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:05,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 477 [2022-11-25 17:47:05,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:06,246 INFO L130 PetriNetUnfolder]: 663/1330 cut-off events. [2022-11-25 17:47:06,246 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:06,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 1330 events. 663/1330 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7290 event pairs, 248 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 2534. Up to 1174 conditions per place. [2022-11-25 17:47:06,254 INFO L137 encePairwiseOnDemand]: 474/477 looper letters, 73 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-25 17:47:06,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 335 flow [2022-11-25 17:47:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2022-11-25 17:47:06,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48846960167714887 [2022-11-25 17:47:06,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2022-11-25 17:47:06,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2022-11-25 17:47:06,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:06,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2022-11-25 17:47:06,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,264 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 3 states and 699 transitions. [2022-11-25 17:47:06,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 335 flow [2022-11-25 17:47:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 331 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:06,268 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 151 flow [2022-11-25 17:47:06,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=477, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2022-11-25 17:47:06,269 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2022-11-25 17:47:06,269 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 151 flow [2022-11-25 17:47:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:06,270 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:06,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:47:06,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:47:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 414122657, now seen corresponding path program 1 times [2022-11-25 17:47:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:06,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280276177] [2022-11-25 17:47:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:06,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:06,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280276177] [2022-11-25 17:47:06,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280276177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:06,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469156784] [2022-11-25 17:47:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:06,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:06,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:06,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:47:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:47:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:06,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:06,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469156784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:06,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:06,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:47:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467917578] [2022-11-25 17:47:06,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:06,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:47:06,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 477 [2022-11-25 17:47:06,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 151 flow. Second operand has 7 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:06,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 477 [2022-11-25 17:47:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:06,935 INFO L130 PetriNetUnfolder]: 663/1320 cut-off events. [2022-11-25 17:47:06,935 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 17:47:06,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 1320 events. 663/1320 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7098 event pairs, 544 based on Foata normal form. 3/1125 useless extension candidates. Maximal degree in co-relation 2560. Up to 1194 conditions per place. [2022-11-25 17:47:06,943 INFO L137 encePairwiseOnDemand]: 474/477 looper letters, 54 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-11-25 17:47:06,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 281 flow [2022-11-25 17:47:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:47:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:47:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1304 transitions. [2022-11-25 17:47:06,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4556254367575122 [2022-11-25 17:47:06,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1304 transitions. [2022-11-25 17:47:06,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1304 transitions. [2022-11-25 17:47:06,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:06,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1304 transitions. [2022-11-25 17:47:06,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.33333333333334) internal successors, (1304), 6 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 477.0) internal successors, (3339), 7 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 477.0) internal successors, (3339), 7 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,960 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 151 flow. Second operand 6 states and 1304 transitions. [2022-11-25 17:47:06,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 281 flow [2022-11-25 17:47:06,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:06,962 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 183 flow [2022-11-25 17:47:06,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=477, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-11-25 17:47:06,964 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2022-11-25 17:47:06,964 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 183 flow [2022-11-25 17:47:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:06,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:06,966 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-25 17:47:06,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:07,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:47:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash -292402916, now seen corresponding path program 2 times [2022-11-25 17:47:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:07,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226401131] [2022-11-25 17:47:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:07,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:07,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226401131] [2022-11-25 17:47:07,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226401131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492201930] [2022-11-25 17:47:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:07,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:07,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:47:07,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:47:07,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:07,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:07,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492201930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:07,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:07,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:47:07,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174008300] [2022-11-25 17:47:07,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:47:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:47:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:47:07,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 477 [2022-11-25 17:47:07,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 183 flow. Second operand has 13 states, 13 states have (on average 208.30769230769232) internal successors, (2708), 13 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:07,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:07,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 477 [2022-11-25 17:47:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:07,984 INFO L130 PetriNetUnfolder]: 663/1326 cut-off events. [2022-11-25 17:47:07,984 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-25 17:47:07,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 1326 events. 663/1326 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7101 event pairs, 544 based on Foata normal form. 6/1134 useless extension candidates. Maximal degree in co-relation 2548. Up to 1194 conditions per place. [2022-11-25 17:47:07,992 INFO L137 encePairwiseOnDemand]: 474/477 looper letters, 54 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2022-11-25 17:47:07,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 349 flow [2022-11-25 17:47:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:47:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:47:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2555 transitions. [2022-11-25 17:47:08,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44636617749825297 [2022-11-25 17:47:08,000 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2555 transitions. [2022-11-25 17:47:08,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2555 transitions. [2022-11-25 17:47:08,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:08,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2555 transitions. [2022-11-25 17:47:08,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.91666666666666) internal successors, (2555), 12 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 477.0) internal successors, (6201), 13 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,022 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 477.0) internal successors, (6201), 13 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,022 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 183 flow. Second operand 12 states and 2555 transitions. [2022-11-25 17:47:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 349 flow [2022-11-25 17:47:08,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 335 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:08,026 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 253 flow [2022-11-25 17:47:08,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=477, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-11-25 17:47:08,027 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2022-11-25 17:47:08,027 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 253 flow [2022-11-25 17:47:08,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.30769230769232) internal successors, (2708), 13 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:08,029 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 17:47:08,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:08,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:08,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:47:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1213098748, now seen corresponding path program 3 times [2022-11-25 17:47:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953930786] [2022-11-25 17:47:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:08,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:08,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:08,309 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:08,309 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:08,310 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:47:08,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:47:08,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:47:08,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:47:08,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:47:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:47:08,315 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-25 17:47:08,318 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:08,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:47:08,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:47:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,446 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-25 17:47:08,446 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:47:08,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3239 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-25 17:47:08,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,463 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:08,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-25 17:47:08,545 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-25 17:47:08,545 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:47:08,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3239 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-25 17:47:08,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 52824 [2022-11-25 17:47:13,968 INFO L134 LiptonReduction]: Checked pairs total: 84034 [2022-11-25 17:47:13,969 INFO L136 LiptonReduction]: Total number of compositions: 286 [2022-11-25 17:47:13,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:13,973 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;@2c922e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:13,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:47:13,977 INFO L130 PetriNetUnfolder]: 16/44 cut-off events. [2022-11-25 17:47:13,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:13,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:13,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:13,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1923715465, now seen corresponding path program 1 times [2022-11-25 17:47:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:13,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877953303] [2022-11-25 17:47:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:13,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:14,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877953303] [2022-11-25 17:47:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877953303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:14,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:14,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617571576] [2022-11-25 17:47:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:14,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 614 [2022-11-25 17:47:14,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:14,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:14,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 614 [2022-11-25 17:47:14,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:17,815 INFO L130 PetriNetUnfolder]: 21831/33866 cut-off events. [2022-11-25 17:47:17,816 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-11-25 17:47:17,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64817 conditions, 33866 events. 21831/33866 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 239504 event pairs, 18796 based on Foata normal form. 5771/33725 useless extension candidates. Maximal degree in co-relation 26344. Up to 30841 conditions per place. [2022-11-25 17:47:18,020 INFO L137 encePairwiseOnDemand]: 569/614 looper letters, 75 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2022-11-25 17:47:18,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 358 flow [2022-11-25 17:47:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 918 transitions. [2022-11-25 17:47:18,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.498371335504886 [2022-11-25 17:47:18,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 918 transitions. [2022-11-25 17:47:18,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 918 transitions. [2022-11-25 17:47:18,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:18,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 918 transitions. [2022-11-25 17:47:18,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,033 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 286 flow. Second operand 3 states and 918 transitions. [2022-11-25 17:47:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 358 flow [2022-11-25 17:47:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:18,044 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2022-11-25 17:47:18,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2022-11-25 17:47:18,049 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2022-11-25 17:47:18,050 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2022-11-25 17:47:18,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:18,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:47:18,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1983197351, now seen corresponding path program 1 times [2022-11-25 17:47:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001283339] [2022-11-25 17:47:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001283339] [2022-11-25 17:47:18,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001283339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244550177] [2022-11-25 17:47:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:18,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:18,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:47:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:18,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:47:18,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:18,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:18,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244550177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:18,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:18,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 17:47:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109610092] [2022-11-25 17:47:18,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:47:18,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 614 [2022-11-25 17:47:18,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:18,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 614 [2022-11-25 17:47:18,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:21,299 INFO L130 PetriNetUnfolder]: 21474/33713 cut-off events. [2022-11-25 17:47:21,299 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 17:47:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64663 conditions, 33713 events. 21474/33713 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 245986 event pairs, 8970 based on Foata normal form. 0/27751 useless extension candidates. Maximal degree in co-relation 64650. Up to 30791 conditions per place. [2022-11-25 17:47:21,513 INFO L137 encePairwiseOnDemand]: 611/614 looper letters, 95 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-11-25 17:47:21,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 113 transitions, 448 flow [2022-11-25 17:47:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-11-25 17:47:21,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48588490770901194 [2022-11-25 17:47:21,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-11-25 17:47:21,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-11-25 17:47:21,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:21,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-11-25 17:47:21,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 614.0) internal successors, (2456), 4 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,527 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 895 transitions. [2022-11-25 17:47:21,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 113 transitions, 448 flow [2022-11-25 17:47:21,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 113 transitions, 444 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:21,534 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2022-11-25 17:47:21,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2022-11-25 17:47:21,536 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2022-11-25 17:47:21,536 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2022-11-25 17:47:21,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:21,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:21,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:21,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2060958888, now seen corresponding path program 1 times [2022-11-25 17:47:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838466272] [2022-11-25 17:47:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838466272] [2022-11-25 17:47:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838466272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643858259] [2022-11-25 17:47:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:21,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:21,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:21,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:47:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:47:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:21,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643858259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:21,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:21,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:47:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305736133] [2022-11-25 17:47:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:21,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:21,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:47:21,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 614 [2022-11-25 17:47:21,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 267.14285714285717) internal successors, (1870), 7 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:21,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 614 [2022-11-25 17:47:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:24,602 INFO L130 PetriNetUnfolder]: 21923/33774 cut-off events. [2022-11-25 17:47:24,604 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2022-11-25 17:47:24,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65338 conditions, 33774 events. 21923/33774 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 237570 event pairs, 18796 based on Foata normal form. 3/28108 useless extension candidates. Maximal degree in co-relation 65310. Up to 30811 conditions per place. [2022-11-25 17:47:24,835 INFO L137 encePairwiseOnDemand]: 611/614 looper letters, 76 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2022-11-25 17:47:24,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 396 flow [2022-11-25 17:47:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:47:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:47:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2022-11-25 17:47:24,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4541259500542888 [2022-11-25 17:47:24,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2022-11-25 17:47:24,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2022-11-25 17:47:24,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:24,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2022-11-25 17:47:24,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 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) [2022-11-25 17:47:24,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 614.0) internal successors, (4298), 7 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:24,860 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 614.0) internal successors, (4298), 7 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:24,860 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1673 transitions. [2022-11-25 17:47:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 396 flow [2022-11-25 17:47:24,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:24,866 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2022-11-25 17:47:24,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-11-25 17:47:24,867 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2022-11-25 17:47:24,868 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2022-11-25 17:47:24,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 267.14285714285717) internal successors, (1870), 7 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:24,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:24,869 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:24,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:47:25,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash 421356682, now seen corresponding path program 2 times [2022-11-25 17:47:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:25,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649403806] [2022-11-25 17:47:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:25,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649403806] [2022-11-25 17:47:25,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649403806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897876663] [2022-11-25 17:47:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:25,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:25,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:25,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:47:25,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:47:25,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:47:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:25,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-25 17:47:25,435 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:47:25,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 17:47:25,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 17:47:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:47:25,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:25,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897876663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:25,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:25,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-25 17:47:25,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409174353] [2022-11-25 17:47:25,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:25,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:47:25,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:47:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:47:25,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 614 [2022-11-25 17:47:25,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:25,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 614 [2022-11-25 17:47:25,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:30,112 INFO L130 PetriNetUnfolder]: 28356/44372 cut-off events. [2022-11-25 17:47:30,112 INFO L131 PetriNetUnfolder]: For 1079/1079 co-relation queries the response was YES. [2022-11-25 17:47:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86676 conditions, 44372 events. 28356/44372 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 338274 event pairs, 4240 based on Foata normal form. 0/36724 useless extension candidates. Maximal degree in co-relation 86640. Up to 30520 conditions per place. [2022-11-25 17:47:30,341 INFO L137 encePairwiseOnDemand]: 604/614 looper letters, 201 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2022-11-25 17:47:30,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 233 transitions, 996 flow [2022-11-25 17:47:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:47:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:47:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1732 transitions. [2022-11-25 17:47:30,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47014115092290987 [2022-11-25 17:47:30,347 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1732 transitions. [2022-11-25 17:47:30,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1732 transitions. [2022-11-25 17:47:30,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:30,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1732 transitions. [2022-11-25 17:47:30,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.6666666666667) internal successors, (1732), 6 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 614.0) internal successors, (4298), 7 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,358 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 614.0) internal successors, (4298), 7 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,359 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1732 transitions. [2022-11-25 17:47:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 233 transitions, 996 flow [2022-11-25 17:47:30,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 233 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:30,365 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2022-11-25 17:47:30,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2022-11-25 17:47:30,367 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2022-11-25 17:47:30,367 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2022-11-25 17:47:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:30,385 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:30,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:30,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:30,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:30,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 419051701, now seen corresponding path program 1 times [2022-11-25 17:47:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:30,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125070408] [2022-11-25 17:47:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:47:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:30,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125070408] [2022-11-25 17:47:30,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125070408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:30,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986425875] [2022-11-25 17:47:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:30,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:30,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:30,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:47:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:30,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986425875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:30,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:30,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-11-25 17:47:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824101483] [2022-11-25 17:47:30,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:47:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:47:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:47:30,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 614 [2022-11-25 17:47:30,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 263.85714285714283) internal successors, (3694), 14 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:30,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 614 [2022-11-25 17:47:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:34,987 INFO L130 PetriNetUnfolder]: 28325/44201 cut-off events. [2022-11-25 17:47:34,987 INFO L131 PetriNetUnfolder]: For 7657/7657 co-relation queries the response was YES. [2022-11-25 17:47:35,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95135 conditions, 44201 events. 28325/44201 cut-off events. For 7657/7657 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 336606 event pairs, 358 based on Foata normal form. 36/39026 useless extension candidates. Maximal degree in co-relation 95076. Up to 40116 conditions per place. [2022-11-25 17:47:35,204 INFO L137 encePairwiseOnDemand]: 609/614 looper letters, 147 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2022-11-25 17:47:35,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 865 flow [2022-11-25 17:47:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:47:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:47:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3816 transitions. [2022-11-25 17:47:35,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4439274080967892 [2022-11-25 17:47:35,213 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3816 transitions. [2022-11-25 17:47:35,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3816 transitions. [2022-11-25 17:47:35,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:35,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3816 transitions. [2022-11-25 17:47:35,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.57142857142856) internal successors, (3816), 14 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 614.0) internal successors, (9210), 15 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,237 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 614.0) internal successors, (9210), 15 states have internal predecessors, (9210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,237 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3816 transitions. [2022-11-25 17:47:35,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 865 flow [2022-11-25 17:47:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 865 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:47:35,264 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2022-11-25 17:47:35,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=614, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2022-11-25 17:47:35,265 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2022-11-25 17:47:35,265 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2022-11-25 17:47:35,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 263.85714285714283) internal successors, (3694), 14 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:35,267 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:47:35,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 17:47:35,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d7a4fb9-5a5b-46f6-9fc1-b1211fd2e710/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:47:35,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 17:47:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2140425315, now seen corresponding path program 1 times [2022-11-25 17:47:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200424110] [2022-11-25 17:47:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:35,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:35,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:35,538 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:35,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 17:47:35,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 17:47:35,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-25 17:47:35,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 17:47:35,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 17:47:35,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 17:47:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:47:35,540 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-25 17:47:35,541 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:35,541 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:47:35,583 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:47:35,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:35,864 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-25 17:47:35,864 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:47:35,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4919 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-25 17:47:35,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:35,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:35,881 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:35,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:35,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:35,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-25 17:47:36,014 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-25 17:47:36,015 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:47:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4919 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-25 17:47:36,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 94998 [2022-11-25 17:47:42,479 INFO L134 LiptonReduction]: Checked pairs total: 154033 [2022-11-25 17:47:42,479 INFO L136 LiptonReduction]: Total number of compositions: 347 [2022-11-25 17:47:42,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:42,481 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;@2c922e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:42,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:47:42,484 INFO L130 PetriNetUnfolder]: 14/41 cut-off events. [2022-11-25 17:47:42,484 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:42,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:42,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:42,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:47:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash -690457302, now seen corresponding path program 1 times [2022-11-25 17:47:42,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:42,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306061598] [2022-11-25 17:47:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306061598] [2022-11-25 17:47:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306061598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:42,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:42,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952189833] [2022-11-25 17:47:42,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:42,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:42,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 748 [2022-11-25 17:47:42,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 166 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:42,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:42,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 748 [2022-11-25 17:47:42,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand