./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8 --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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-e04fb08 [2022-11-16 12:00:07,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:00:07,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:00:07,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:00:07,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:00:07,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:00:07,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:00:07,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:00:07,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:00:07,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:00:07,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:00:07,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:00:07,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:00:07,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:00:07,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:00:07,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:00:07,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:00:07,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:00:07,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:00:07,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:00:07,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:00:07,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:00:07,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:00:07,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:00:07,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:00:07,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:00:07,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:00:07,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:00:07,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:00:07,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:00:07,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:00:07,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:00:07,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:00:07,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:00:07,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:00:07,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:00:07,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:00:07,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:00:07,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:00:07,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:00:07,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:00:07,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:00:07,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:00:07,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:00:07,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:00:07,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:00:07,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:00:07,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:00:07,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:00:07,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:00:07,487 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:00:07,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:00:07,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:00:07,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:00:07,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:00:07,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:00:07,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:00:07,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:00:07,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:00:07,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:00:07,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:00:07,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:00:07,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:00:07,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:00:07,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:00:07,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:00:07,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:07,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:00:07,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:00:07,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:00:07,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:00:07,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:00:07,494 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:00:07,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:00:07,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:00:07,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-16 12:00:07,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:00:07,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:00:07,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:00:07,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:00:07,821 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:00:07,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-16 12:00:07,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/data/86c5b6f23/4ba905b62de6408ca597127a5879af0d/FLAGcae58530f [2022-11-16 12:00:08,399 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:00:08,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-16 12:00:08,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/data/86c5b6f23/4ba905b62de6408ca597127a5879af0d/FLAGcae58530f [2022-11-16 12:00:08,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/data/86c5b6f23/4ba905b62de6408ca597127a5879af0d [2022-11-16 12:00:08,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:00:08,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:00:08,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:08,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:00:08,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:00:08,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:08" (1/1) ... [2022-11-16 12:00:08,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a34f457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:08, skipping insertion in model container [2022-11-16 12:00:08,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:08" (1/1) ... [2022-11-16 12:00:08,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:00:08,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:00:08,999 WARN L229 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_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-16 12:00:09,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:09,008 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:00:09,024 WARN L229 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_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-16 12:00:09,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:09,038 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:00:09,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09 WrapperNode [2022-11-16 12:00:09,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:09,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:09,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:00:09,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:00:09,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,080 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-16 12:00:09,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:09,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:00:09,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:00:09,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:00:09,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,110 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:00:09,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:00:09,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:00:09,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:00:09,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (1/1) ... [2022-11-16 12:00:09,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:09,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:00:09,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:00:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:00:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:00:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:00:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:00:09,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:00:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:00:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:00:09,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:00:09,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:00:09,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:00:09,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:00:09,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:00:09,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:00:09,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:00:09,212 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:00:09,351 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:00:09,355 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:00:09,554 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:00:09,599 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:00:09,615 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:00:09,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:09 BoogieIcfgContainer [2022-11-16 12:00:09,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:00:09,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:00:09,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:00:09,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:00:09,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:00:08" (1/3) ... [2022-11-16 12:00:09,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a35f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:09, skipping insertion in model container [2022-11-16 12:00:09,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:09" (2/3) ... [2022-11-16 12:00:09,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a35f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:09, skipping insertion in model container [2022-11-16 12:00:09,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:09" (3/3) ... [2022-11-16 12:00:09,633 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-16 12:00:09,643 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:00:09,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:00:09,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:00:09,658 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:00:09,769 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:00:09,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-11-16 12:00:09,908 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-16 12:00:09,908 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:00:09,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-16 12:00:09,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-11-16 12:00:09,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-11-16 12:00:09,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:00:09,937 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;@836a0c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:00:09,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:00:09,961 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-11-16 12:00:09,962 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:00:09,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:09,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:09,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 456373441, now seen corresponding path program 1 times [2022-11-16 12:00:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:09,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081822212] [2022-11-16 12:00:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:10,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081822212] [2022-11-16 12:00:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081822212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:10,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:00:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592147246] [2022-11-16 12:00:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:00:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:00:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:00:10,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-11-16 12:00:10,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:10,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-11-16 12:00:10,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:10,310 INFO L130 PetriNetUnfolder]: 10/93 cut-off events. [2022-11-16 12:00:10,318 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-16 12:00:10,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-16 12:00:10,321 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-11-16 12:00:10,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-11-16 12:00:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:00:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:00:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-11-16 12:00:10,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-11-16 12:00:10,335 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-11-16 12:00:10,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-11-16 12:00:10,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:10,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-11-16 12:00:10,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,347 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,349 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-11-16 12:00:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-11-16 12:00:10,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:00:10,356 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-11-16 12:00:10,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-16 12:00:10,362 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-11-16 12:00:10,362 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-11-16 12:00:10,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:10,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:00:10,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-11-16 12:00:10,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778787613] [2022-11-16 12:00:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:10,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778787613] [2022-11-16 12:00:10,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778787613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:10,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:10,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:00:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696493431] [2022-11-16 12:00:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:10,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:00:10,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:00:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:00:10,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-11-16 12:00:10,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:10,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:10,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-11-16 12:00:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:10,998 INFO L130 PetriNetUnfolder]: 64/183 cut-off events. [2022-11-16 12:00:10,999 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 12:00:11,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-11-16 12:00:11,002 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-16 12:00:11,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-11-16 12:00:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:00:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:00:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-11-16 12:00:11,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-11-16 12:00:11,006 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-11-16 12:00:11,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-11-16 12:00:11,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:11,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-11-16 12:00:11,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,017 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,017 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-11-16 12:00:11,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-11-16 12:00:11,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:00:11,020 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-11-16 12:00:11,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-11-16 12:00:11,022 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-11-16 12:00:11,022 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-11-16 12:00:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:11,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:11,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:00:11,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-11-16 12:00:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:11,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456738575] [2022-11-16 12:00:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:11,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456738575] [2022-11-16 12:00:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456738575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:11,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:11,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:00:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201632051] [2022-11-16 12:00:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:11,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:00:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:11,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:00:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:00:11,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-16 12:00:11,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:11,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-16 12:00:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:11,318 INFO L130 PetriNetUnfolder]: 87/283 cut-off events. [2022-11-16 12:00:11,319 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-16 12:00:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1080 event pairs, 37 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-11-16 12:00:11,322 INFO L137 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-11-16 12:00:11,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-11-16 12:00:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:00:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:00:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-11-16 12:00:11,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-11-16 12:00:11,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-11-16 12:00:11,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-11-16 12:00:11,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:11,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-11-16 12:00:11,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,330 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,330 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-11-16 12:00:11,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-11-16 12:00:11,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:00:11,333 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-11-16 12:00:11,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-11-16 12:00:11,335 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-11-16 12:00:11,335 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-11-16 12:00:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:11,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:00:11,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 535359789, now seen corresponding path program 2 times [2022-11-16 12:00:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616738101] [2022-11-16 12:00:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:11,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616738101] [2022-11-16 12:00:11,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616738101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559571867] [2022-11-16 12:00:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:11,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:11,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:00:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:00:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:00:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:00:11,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:11,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559571867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:11,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:00:11,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-11-16 12:00:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824925886] [2022-11-16 12:00:11,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:00:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:00:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:00:11,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-11-16 12:00:11,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:11,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:11,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-11-16 12:00:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:12,049 INFO L130 PetriNetUnfolder]: 44/166 cut-off events. [2022-11-16 12:00:12,049 INFO L131 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-11-16 12:00:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 521 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-11-16 12:00:12,052 INFO L137 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-11-16 12:00:12,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-11-16 12:00:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:00:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:00:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-11-16 12:00:12,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-11-16 12:00:12,056 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-11-16 12:00:12,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-11-16 12:00:12,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:12,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-11-16 12:00:12,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:12,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:12,063 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:12,063 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-11-16 12:00:12,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-11-16 12:00:12,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 12:00:12,067 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-11-16 12:00:12,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-11-16 12:00:12,068 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-11-16 12:00:12,068 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-11-16 12:00:12,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:12,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:12,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:12,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:00:12,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:12,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1175529915, now seen corresponding path program 1 times [2022-11-16 12:00:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:12,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827817397] [2022-11-16 12:00:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827817397] [2022-11-16 12:00:12,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827817397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:12,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686347011] [2022-11-16 12:00:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:12,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:12,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:00:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:00:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:12,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:13,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686347011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:13,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:13,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-11-16 12:00:13,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655072135] [2022-11-16 12:00:13,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:00:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:00:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:00:13,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-16 12:00:13,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:13,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-16 12:00:13,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:13,347 INFO L130 PetriNetUnfolder]: 17/162 cut-off events. [2022-11-16 12:00:13,347 INFO L131 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-11-16 12:00:13,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-11-16 12:00:13,352 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-11-16 12:00:13,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-11-16 12:00:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:00:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:00:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-11-16 12:00:13,354 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-11-16 12:00:13,355 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-11-16 12:00:13,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-11-16 12:00:13,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:13,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-11-16 12:00:13,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,358 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,358 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-11-16 12:00:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-11-16 12:00:13,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 12:00:13,367 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-11-16 12:00:13,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-16 12:00:13,371 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-11-16 12:00:13,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-11-16 12:00:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:13,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:13,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:13,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash 935055537, now seen corresponding path program 2 times [2022-11-16 12:00:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264395743] [2022-11-16 12:00:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:00:13,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264395743] [2022-11-16 12:00:13,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264395743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932477734] [2022-11-16 12:00:13,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:13,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:13,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:13,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:00:13,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:00:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:00:13,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:00:14,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932477734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:14,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:14,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-16 12:00:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415260940] [2022-11-16 12:00:14,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:14,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-11-16 12:00:14,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:14,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:14,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-11-16 12:00:14,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:14,286 INFO L130 PetriNetUnfolder]: 109/370 cut-off events. [2022-11-16 12:00:14,286 INFO L131 PetriNetUnfolder]: For 201/211 co-relation queries the response was YES. [2022-11-16 12:00:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 201/211 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1745 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 123 conditions per place. [2022-11-16 12:00:14,291 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-11-16 12:00:14,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-11-16 12:00:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:00:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:00:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-11-16 12:00:14,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-11-16 12:00:14,296 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-11-16 12:00:14,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-11-16 12:00:14,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:14,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-11-16 12:00:14,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:14,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:14,300 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:14,300 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-11-16 12:00:14,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-11-16 12:00:14,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 12:00:14,306 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-11-16 12:00:14,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-11-16 12:00:14,310 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-11-16 12:00:14,310 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-11-16 12:00:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:14,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:14,311 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:14,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:14,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:14,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1891359299, now seen corresponding path program 3 times [2022-11-16 12:00:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:14,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185891134] [2022-11-16 12:00:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:14,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:14,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185891134] [2022-11-16 12:00:14,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185891134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232382224] [2022-11-16 12:00:14,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:00:14,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:14,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:14,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:14,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:00:14,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:00:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:15,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232382224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:15,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:15,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-11-16 12:00:15,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462726602] [2022-11-16 12:00:15,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:00:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:00:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:00:15,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:15,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:15,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:15,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:15,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:16,889 INFO L130 PetriNetUnfolder]: 312/859 cut-off events. [2022-11-16 12:00:16,889 INFO L131 PetriNetUnfolder]: For 1299/1299 co-relation queries the response was YES. [2022-11-16 12:00:16,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 859 events. 312/859 cut-off events. For 1299/1299 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4686 event pairs, 14 based on Foata normal form. 29/887 useless extension candidates. Maximal degree in co-relation 2530. Up to 168 conditions per place. [2022-11-16 12:00:16,897 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-11-16 12:00:16,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 1960 flow [2022-11-16 12:00:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 12:00:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-16 12:00:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3311 transitions. [2022-11-16 12:00:16,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7477416440831075 [2022-11-16 12:00:16,906 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3311 transitions. [2022-11-16 12:00:16,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3311 transitions. [2022-11-16 12:00:16,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:16,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3311 transitions. [2022-11-16 12:00:16,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 61.31481481481482) internal successors, (3311), 54 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:16,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 82.0) internal successors, (4510), 55 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:16,930 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 82.0) internal successors, (4510), 55 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:16,930 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 54 states and 3311 transitions. [2022-11-16 12:00:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 1960 flow [2022-11-16 12:00:16,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-16 12:00:16,947 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 1422 flow [2022-11-16 12:00:16,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2022-11-16 12:00:16,948 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2022-11-16 12:00:16,948 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1422 flow [2022-11-16 12:00:16,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:16,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:16,949 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:16,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:00:17,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1408127925, now seen corresponding path program 4 times [2022-11-16 12:00:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685470043] [2022-11-16 12:00:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685470043] [2022-11-16 12:00:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685470043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582089879] [2022-11-16 12:00:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:17,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:17,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:17,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:00:17,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:17,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:00:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:17,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:18,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582089879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:18,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:18,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-16 12:00:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717236643] [2022-11-16 12:00:18,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:18,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:00:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:18,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:00:18,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:00:18,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:18,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:18,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:18,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:20,376 INFO L130 PetriNetUnfolder]: 789/2294 cut-off events. [2022-11-16 12:00:20,377 INFO L131 PetriNetUnfolder]: For 7914/7914 co-relation queries the response was YES. [2022-11-16 12:00:20,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8794 conditions, 2294 events. 789/2294 cut-off events. For 7914/7914 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17322 event pairs, 55 based on Foata normal form. 124/2410 useless extension candidates. Maximal degree in co-relation 8768. Up to 444 conditions per place. [2022-11-16 12:00:20,402 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-11-16 12:00:20,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 6678 flow [2022-11-16 12:00:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:00:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-16 12:00:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-11-16 12:00:20,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-11-16 12:00:20,412 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-11-16 12:00:20,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-11-16 12:00:20,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:20,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-11-16 12:00:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:20,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:20,443 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:20,444 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-11-16 12:00:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 6678 flow [2022-11-16 12:00:20,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 712 transitions, 6189 flow, removed 216 selfloop flow, removed 5 redundant places. [2022-11-16 12:00:20,504 INFO L231 Difference]: Finished difference. Result has 238 places, 492 transitions, 4917 flow [2022-11-16 12:00:20,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4917, PETRI_PLACES=238, PETRI_TRANSITIONS=492} [2022-11-16 12:00:20,507 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 166 predicate places. [2022-11-16 12:00:20,507 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 492 transitions, 4917 flow [2022-11-16 12:00:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:20,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:20,508 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:20,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:20,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:20,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1094755459, now seen corresponding path program 5 times [2022-11-16 12:00:20,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304223405] [2022-11-16 12:00:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:20,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:20,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304223405] [2022-11-16 12:00:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304223405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:20,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879524468] [2022-11-16 12:00:20,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:00:20,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:20,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:00:21,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:00:21,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:21,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:00:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:21,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:21,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879524468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:21,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:21,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-11-16 12:00:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805904657] [2022-11-16 12:00:21,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:00:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:00:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:00:21,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:21,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 492 transitions, 4917 flow. Second operand has 25 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:21,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:21,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:21,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:23,491 INFO L130 PetriNetUnfolder]: 962/2730 cut-off events. [2022-11-16 12:00:23,491 INFO L131 PetriNetUnfolder]: For 23237/23237 co-relation queries the response was YES. [2022-11-16 12:00:23,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14529 conditions, 2730 events. 962/2730 cut-off events. For 23237/23237 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21748 event pairs, 21 based on Foata normal form. 33/2753 useless extension candidates. Maximal degree in co-relation 14475. Up to 512 conditions per place. [2022-11-16 12:00:23,534 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-11-16 12:00:23,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 746 transitions, 9029 flow [2022-11-16 12:00:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:00:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 12:00:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-11-16 12:00:23,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-11-16 12:00:23,538 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-11-16 12:00:23,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-11-16 12:00:23,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:23,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-11-16 12:00:23,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,550 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,550 INFO L175 Difference]: Start difference. First operand has 238 places, 492 transitions, 4917 flow. Second operand 39 states and 2387 transitions. [2022-11-16 12:00:23,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 746 transitions, 9029 flow [2022-11-16 12:00:23,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 746 transitions, 8709 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-11-16 12:00:23,744 INFO L231 Difference]: Finished difference. Result has 287 places, 646 transitions, 8208 flow [2022-11-16 12:00:23,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8208, PETRI_PLACES=287, PETRI_TRANSITIONS=646} [2022-11-16 12:00:23,745 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 215 predicate places. [2022-11-16 12:00:23,745 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 646 transitions, 8208 flow [2022-11-16 12:00:23,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:23,746 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:23,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:23,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1938691821, now seen corresponding path program 6 times [2022-11-16 12:00:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541418303] [2022-11-16 12:00:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541418303] [2022-11-16 12:00:24,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541418303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:24,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256939618] [2022-11-16 12:00:24,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:00:24,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:24,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:24,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:24,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:00:24,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:00:24,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:24,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:24,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256939618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:24,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:24,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-16 12:00:24,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361243656] [2022-11-16 12:00:24,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:24,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:00:24,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:00:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:00:24,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:24,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 646 transitions, 8208 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:24,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:24,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:24,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:27,987 INFO L130 PetriNetUnfolder]: 1247/3671 cut-off events. [2022-11-16 12:00:27,987 INFO L131 PetriNetUnfolder]: For 46548/46548 co-relation queries the response was YES. [2022-11-16 12:00:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22552 conditions, 3671 events. 1247/3671 cut-off events. For 46548/46548 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31681 event pairs, 59 based on Foata normal form. 38/3677 useless extension candidates. Maximal degree in co-relation 22484. Up to 626 conditions per place. [2022-11-16 12:00:28,060 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-11-16 12:00:28,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1105 transitions, 16326 flow [2022-11-16 12:00:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 12:00:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 12:00:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-11-16 12:00:28,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-11-16 12:00:28,081 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-11-16 12:00:28,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-11-16 12:00:28,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:28,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-11-16 12:00:28,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:28,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:28,131 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:28,132 INFO L175 Difference]: Start difference. First operand has 287 places, 646 transitions, 8208 flow. Second operand 72 states and 4397 transitions. [2022-11-16 12:00:28,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1105 transitions, 16326 flow [2022-11-16 12:00:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 15319 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-11-16 12:00:28,522 INFO L231 Difference]: Finished difference. Result has 369 places, 944 transitions, 14094 flow [2022-11-16 12:00:28,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14094, PETRI_PLACES=369, PETRI_TRANSITIONS=944} [2022-11-16 12:00:28,524 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 297 predicate places. [2022-11-16 12:00:28,524 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 944 transitions, 14094 flow [2022-11-16 12:00:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:28,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:28,526 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:28,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:00:28,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:00:28,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 946092587, now seen corresponding path program 7 times [2022-11-16 12:00:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659015648] [2022-11-16 12:00:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:28,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:29,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:29,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659015648] [2022-11-16 12:00:29,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659015648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945309300] [2022-11-16 12:00:29,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:00:29,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:29,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:29,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:00:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:29,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945309300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:29,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:29,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-16 12:00:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854615219] [2022-11-16 12:00:29,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:00:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:00:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:00:29,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:29,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 944 transitions, 14094 flow. Second operand has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:29,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:29,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:29,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:32,568 INFO L130 PetriNetUnfolder]: 1335/4010 cut-off events. [2022-11-16 12:00:32,568 INFO L131 PetriNetUnfolder]: For 66881/66881 co-relation queries the response was YES. [2022-11-16 12:00:32,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27449 conditions, 4010 events. 1335/4010 cut-off events. For 66881/66881 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35704 event pairs, 29 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 27355. Up to 674 conditions per place. [2022-11-16 12:00:32,642 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-11-16 12:00:32,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1216 transitions, 21060 flow [2022-11-16 12:00:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:00:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:00:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-11-16 12:00:32,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-11-16 12:00:32,654 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-11-16 12:00:32,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-11-16 12:00:32,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:32,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-11-16 12:00:32,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:32,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:32,669 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:32,669 INFO L175 Difference]: Start difference. First operand has 369 places, 944 transitions, 14094 flow. Second operand 41 states and 2515 transitions. [2022-11-16 12:00:32,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1216 transitions, 21060 flow [2022-11-16 12:00:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1216 transitions, 20578 flow, removed 170 selfloop flow, removed 22 redundant places. [2022-11-16 12:00:33,248 INFO L231 Difference]: Finished difference. Result has 395 places, 1064 transitions, 17947 flow [2022-11-16 12:00:33,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13590, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17947, PETRI_PLACES=395, PETRI_TRANSITIONS=1064} [2022-11-16 12:00:33,250 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 323 predicate places. [2022-11-16 12:00:33,250 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1064 transitions, 17947 flow [2022-11-16 12:00:33,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:33,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:33,251 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:33,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:33,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash -588062631, now seen corresponding path program 8 times [2022-11-16 12:00:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:33,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900901875] [2022-11-16 12:00:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:33,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900901875] [2022-11-16 12:00:33,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900901875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145654806] [2022-11-16 12:00:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:33,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:33,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:33,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:00:33,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:33,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:33,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:34,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145654806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:34,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:34,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:00:34,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426312990] [2022-11-16 12:00:34,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:34,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:00:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:00:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:00:34,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:34,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1064 transitions, 17947 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:34,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:34,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:34,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:36,459 INFO L130 PetriNetUnfolder]: 1306/3863 cut-off events. [2022-11-16 12:00:36,460 INFO L131 PetriNetUnfolder]: For 65720/65720 co-relation queries the response was YES. [2022-11-16 12:00:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28430 conditions, 3863 events. 1306/3863 cut-off events. For 65720/65720 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33895 event pairs, 122 based on Foata normal form. 1/3802 useless extension candidates. Maximal degree in co-relation 28333. Up to 655 conditions per place. [2022-11-16 12:00:36,541 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 467 selfloop transitions, 618 changer transitions 12/1142 dead transitions. [2022-11-16 12:00:36,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1142 transitions, 21252 flow [2022-11-16 12:00:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:00:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:00:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-11-16 12:00:36,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-11-16 12:00:36,545 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-11-16 12:00:36,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-11-16 12:00:36,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:36,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-11-16 12:00:36,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,553 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,553 INFO L175 Difference]: Start difference. First operand has 395 places, 1064 transitions, 17947 flow. Second operand 21 states and 1296 transitions. [2022-11-16 12:00:36,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1142 transitions, 21252 flow [2022-11-16 12:00:37,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1142 transitions, 20491 flow, removed 95 selfloop flow, removed 20 redundant places. [2022-11-16 12:00:37,571 INFO L231 Difference]: Finished difference. Result has 397 places, 1081 transitions, 18725 flow [2022-11-16 12:00:37,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17222, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18725, PETRI_PLACES=397, PETRI_TRANSITIONS=1081} [2022-11-16 12:00:37,574 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 325 predicate places. [2022-11-16 12:00:37,576 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1081 transitions, 18725 flow [2022-11-16 12:00:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:37,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:37,577 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:37,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:00:37,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:00:37,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1655063311, now seen corresponding path program 9 times [2022-11-16 12:00:37,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169639105] [2022-11-16 12:00:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:37,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169639105] [2022-11-16 12:00:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169639105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649529457] [2022-11-16 12:00:37,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:00:37,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:37,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:37,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:00:38,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:00:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:38,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649529457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:38,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-16 12:00:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590591476] [2022-11-16 12:00:38,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:38,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:00:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:00:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:00:38,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:38,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1081 transitions, 18725 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:38,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:38,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:42,135 INFO L130 PetriNetUnfolder]: 1753/5165 cut-off events. [2022-11-16 12:00:42,135 INFO L131 PetriNetUnfolder]: For 92388/92388 co-relation queries the response was YES. [2022-11-16 12:00:42,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38661 conditions, 5165 events. 1753/5165 cut-off events. For 92388/92388 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 48089 event pairs, 68 based on Foata normal form. 43/5173 useless extension candidates. Maximal degree in co-relation 38562. Up to 927 conditions per place. [2022-11-16 12:00:42,217 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 339 selfloop transitions, 1251 changer transitions 3/1638 dead transitions. [2022-11-16 12:00:42,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1638 transitions, 31387 flow [2022-11-16 12:00:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:00:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-16 12:00:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-11-16 12:00:42,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-11-16 12:00:42,225 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-11-16 12:00:42,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-11-16 12:00:42,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:42,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-11-16 12:00:42,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:42,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:42,244 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:42,244 INFO L175 Difference]: Start difference. First operand has 397 places, 1081 transitions, 18725 flow. Second operand 63 states and 3837 transitions. [2022-11-16 12:00:42,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1638 transitions, 31387 flow [2022-11-16 12:00:43,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1638 transitions, 30331 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-16 12:00:43,336 INFO L231 Difference]: Finished difference. Result has 467 places, 1493 transitions, 29773 flow [2022-11-16 12:00:43,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17981, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=29773, PETRI_PLACES=467, PETRI_TRANSITIONS=1493} [2022-11-16 12:00:43,338 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 395 predicate places. [2022-11-16 12:00:43,338 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1493 transitions, 29773 flow [2022-11-16 12:00:43,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:43,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:43,339 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:43,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:43,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:43,544 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1216921135, now seen corresponding path program 10 times [2022-11-16 12:00:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192541010] [2022-11-16 12:00:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:43,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192541010] [2022-11-16 12:00:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192541010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145646261] [2022-11-16 12:00:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:43,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:43,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:43,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:00:43,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:00:43,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:44,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:44,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145646261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:44,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:44,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-16 12:00:44,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525117027] [2022-11-16 12:00:44,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:44,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:00:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:00:44,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:00:44,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:44,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1493 transitions, 29773 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:44,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:44,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:44,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:48,239 INFO L130 PetriNetUnfolder]: 1765/5272 cut-off events. [2022-11-16 12:00:48,239 INFO L131 PetriNetUnfolder]: For 119838/119838 co-relation queries the response was YES. [2022-11-16 12:00:48,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43654 conditions, 5272 events. 1765/5272 cut-off events. For 119838/119838 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49872 event pairs, 89 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 43536. Up to 900 conditions per place. [2022-11-16 12:00:48,345 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1047 changer transitions 16/1647 dead transitions. [2022-11-16 12:00:48,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1647 transitions, 35616 flow [2022-11-16 12:00:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:00:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:00:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-11-16 12:00:48,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-11-16 12:00:48,350 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-11-16 12:00:48,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-11-16 12:00:48,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:48,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-11-16 12:00:48,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,361 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,361 INFO L175 Difference]: Start difference. First operand has 467 places, 1493 transitions, 29773 flow. Second operand 41 states and 2525 transitions. [2022-11-16 12:00:48,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1647 transitions, 35616 flow [2022-11-16 12:00:49,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1647 transitions, 34819 flow, removed 132 selfloop flow, removed 31 redundant places. [2022-11-16 12:00:49,819 INFO L231 Difference]: Finished difference. Result has 483 places, 1527 transitions, 32195 flow [2022-11-16 12:00:49,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28976, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32195, PETRI_PLACES=483, PETRI_TRANSITIONS=1527} [2022-11-16 12:00:49,820 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 411 predicate places. [2022-11-16 12:00:49,820 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1527 transitions, 32195 flow [2022-11-16 12:00:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:49,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:49,821 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:49,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:50,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:00:50,023 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:00:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -255095131, now seen corresponding path program 11 times [2022-11-16 12:00:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10604284] [2022-11-16 12:00:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:50,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10604284] [2022-11-16 12:00:50,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10604284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394231783] [2022-11-16 12:00:50,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:00:50,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:50,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:50,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:00:50,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:00:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:00:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394231783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:50,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-16 12:00:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676347277] [2022-11-16 12:00:50,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:00:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:00:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:00:50,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:00:50,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1527 transitions, 32195 flow. Second operand has 21 states, 21 states have (on average 59.333333333333336) internal successors, (1246), 21 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:50,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:50,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:00:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:56,851 INFO L130 PetriNetUnfolder]: 2376/7284 cut-off events. [2022-11-16 12:00:56,851 INFO L131 PetriNetUnfolder]: For 181599/181599 co-relation queries the response was YES. [2022-11-16 12:00:56,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62905 conditions, 7284 events. 2376/7284 cut-off events. For 181599/181599 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 74029 event pairs, 58 based on Foata normal form. 43/7289 useless extension candidates. Maximal degree in co-relation 62781. Up to 1156 conditions per place. [2022-11-16 12:00:57,032 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 827 selfloop transitions, 1402 changer transitions 25/2299 dead transitions. [2022-11-16 12:00:57,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 2299 transitions, 52676 flow [2022-11-16 12:00:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 12:00:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-16 12:00:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4088 transitions. [2022-11-16 12:00:57,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7440844557699309 [2022-11-16 12:00:57,041 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4088 transitions. [2022-11-16 12:00:57,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4088 transitions. [2022-11-16 12:00:57,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:57,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4088 transitions. [2022-11-16 12:00:57,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 61.014925373134325) internal successors, (4088), 67 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,062 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,062 INFO L175 Difference]: Start difference. First operand has 483 places, 1527 transitions, 32195 flow. Second operand 67 states and 4088 transitions. [2022-11-16 12:00:57,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 2299 transitions, 52676 flow [2022-11-16 12:01:00,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 2299 transitions, 50906 flow, removed 145 selfloop flow, removed 26 redundant places. [2022-11-16 12:01:00,277 INFO L231 Difference]: Finished difference. Result has 548 places, 2042 transitions, 47402 flow [2022-11-16 12:01:00,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30890, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=47402, PETRI_PLACES=548, PETRI_TRANSITIONS=2042} [2022-11-16 12:01:00,279 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 476 predicate places. [2022-11-16 12:01:00,279 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 2042 transitions, 47402 flow [2022-11-16 12:01:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.333333333333336) internal successors, (1246), 21 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:00,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:01:00,280 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:00,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:01:00,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:01:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1753826647, now seen corresponding path program 12 times [2022-11-16 12:01:00,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:00,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177209559] [2022-11-16 12:01:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177209559] [2022-11-16 12:01:00,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177209559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:00,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765802071] [2022-11-16 12:01:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:01:00,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:00,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:00,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:01:00,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:01:00,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:01:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:00,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:01,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765802071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:01,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:01,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:01:01,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891369550] [2022-11-16 12:01:01,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:01:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:01:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:01:01,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:01:01,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 2042 transitions, 47402 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:01,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:01:01,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:01:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:01:07,997 INFO L130 PetriNetUnfolder]: 2715/8205 cut-off events. [2022-11-16 12:01:07,998 INFO L131 PetriNetUnfolder]: For 258069/258074 co-relation queries the response was YES. [2022-11-16 12:01:08,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78408 conditions, 8205 events. 2715/8205 cut-off events. For 258069/258074 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84667 event pairs, 181 based on Foata normal form. 1/8167 useless extension candidates. Maximal degree in co-relation 78260. Up to 3460 conditions per place. [2022-11-16 12:01:08,105 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1844 selfloop transitions, 556 changer transitions 8/2453 dead transitions. [2022-11-16 12:01:08,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 2453 transitions, 61944 flow [2022-11-16 12:01:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:01:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 12:01:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1655 transitions. [2022-11-16 12:01:08,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7475158084914183 [2022-11-16 12:01:08,109 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1655 transitions. [2022-11-16 12:01:08,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1655 transitions. [2022-11-16 12:01:08,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:01:08,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1655 transitions. [2022-11-16 12:01:08,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.2962962962963) internal successors, (1655), 27 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:08,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:08,116 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:08,116 INFO L175 Difference]: Start difference. First operand has 548 places, 2042 transitions, 47402 flow. Second operand 27 states and 1655 transitions. [2022-11-16 12:01:08,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 2453 transitions, 61944 flow [2022-11-16 12:01:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2453 transitions, 59624 flow, removed 931 selfloop flow, removed 19 redundant places. [2022-11-16 12:01:13,936 INFO L231 Difference]: Finished difference. Result has 566 places, 2202 transitions, 51603 flow [2022-11-16 12:01:13,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=45800, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=51603, PETRI_PLACES=566, PETRI_TRANSITIONS=2202} [2022-11-16 12:01:13,938 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 494 predicate places. [2022-11-16 12:01:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 2202 transitions, 51603 flow [2022-11-16 12:01:13,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:13,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:01:13,939 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:13,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:01:14,145 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:01:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1591125555, now seen corresponding path program 13 times [2022-11-16 12:01:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:14,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146387283] [2022-11-16 12:01:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146387283] [2022-11-16 12:01:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146387283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214474760] [2022-11-16 12:01:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:01:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:14,329 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:14,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:01:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:01:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:14,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:14,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214474760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:14,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:14,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:01:14,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697136920] [2022-11-16 12:01:14,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:14,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:01:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:01:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:01:14,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:01:14,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 2202 transitions, 51603 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:14,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:01:14,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:01:14,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:01:22,140 INFO L130 PetriNetUnfolder]: 2722/8224 cut-off events. [2022-11-16 12:01:22,140 INFO L131 PetriNetUnfolder]: For 237754/237759 co-relation queries the response was YES. [2022-11-16 12:01:22,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76693 conditions, 8224 events. 2722/8224 cut-off events. For 237754/237759 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 84887 event pairs, 137 based on Foata normal form. 1/8187 useless extension candidates. Maximal degree in co-relation 76533. Up to 3982 conditions per place. [2022-11-16 12:01:22,755 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1775 selfloop transitions, 426 changer transitions 6/2252 dead transitions. [2022-11-16 12:01:22,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 2252 transitions, 56970 flow [2022-11-16 12:01:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:01:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:01:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-11-16 12:01:22,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-11-16 12:01:22,758 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-11-16 12:01:22,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-11-16 12:01:22,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:01:22,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-11-16 12:01:22,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:22,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:22,765 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:22,766 INFO L175 Difference]: Start difference. First operand has 566 places, 2202 transitions, 51603 flow. Second operand 18 states and 1101 transitions. [2022-11-16 12:01:22,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 2252 transitions, 56970 flow [2022-11-16 12:01:28,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 2252 transitions, 56872 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-11-16 12:01:28,610 INFO L231 Difference]: Finished difference. Result has 574 places, 2213 transitions, 52860 flow [2022-11-16 12:01:28,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=51505, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=52860, PETRI_PLACES=574, PETRI_TRANSITIONS=2213} [2022-11-16 12:01:28,611 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 502 predicate places. [2022-11-16 12:01:28,612 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 2213 transitions, 52860 flow [2022-11-16 12:01:28,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:28,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:01:28,612 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:28,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:01:28,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:01:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1669028813, now seen corresponding path program 14 times [2022-11-16 12:01:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:28,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964362675] [2022-11-16 12:01:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:28,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964362675] [2022-11-16 12:01:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964362675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:28,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412652926] [2022-11-16 12:01:28,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:28,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:28,978 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:29,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:01:29,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:29,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:01:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:29,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412652926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:29,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-16 12:01:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357986267] [2022-11-16 12:01:29,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:01:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:01:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:01:29,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:01:29,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 2213 transitions, 52860 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:29,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:01:29,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:01:29,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:01:38,917 INFO L130 PetriNetUnfolder]: 3092/9616 cut-off events. [2022-11-16 12:01:38,917 INFO L131 PetriNetUnfolder]: For 298898/298903 co-relation queries the response was YES. [2022-11-16 12:01:39,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89651 conditions, 9616 events. 3092/9616 cut-off events. For 298898/298903 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 103398 event pairs, 147 based on Foata normal form. 13/9565 useless extension candidates. Maximal degree in co-relation 89488. Up to 1851 conditions per place. [2022-11-16 12:01:39,135 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1394 selfloop transitions, 1249 changer transitions 8/2696 dead transitions. [2022-11-16 12:01:39,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 2696 transitions, 69457 flow [2022-11-16 12:01:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:01:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-16 12:01:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2661 transitions. [2022-11-16 12:01:39,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7546795235394215 [2022-11-16 12:01:39,142 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2661 transitions. [2022-11-16 12:01:39,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2661 transitions. [2022-11-16 12:01:39,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:01:39,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2661 transitions. [2022-11-16 12:01:39,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.883720930232556) internal successors, (2661), 43 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:39,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:39,155 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:39,155 INFO L175 Difference]: Start difference. First operand has 574 places, 2213 transitions, 52860 flow. Second operand 43 states and 2661 transitions. [2022-11-16 12:01:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 2696 transitions, 69457 flow [2022-11-16 12:01:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 2696 transitions, 69250 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-16 12:01:46,359 INFO L231 Difference]: Finished difference. Result has 617 places, 2459 transitions, 62960 flow [2022-11-16 12:01:46,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=52621, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=62960, PETRI_PLACES=617, PETRI_TRANSITIONS=2459} [2022-11-16 12:01:46,362 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 545 predicate places. [2022-11-16 12:01:46,362 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 2459 transitions, 62960 flow [2022-11-16 12:01:46,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:46,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:01:46,363 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:46,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:46,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:01:46,579 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:01:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075301, now seen corresponding path program 15 times [2022-11-16 12:01:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:46,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013807628] [2022-11-16 12:01:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:46,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:46,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013807628] [2022-11-16 12:01:46,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013807628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882569188] [2022-11-16 12:01:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:01:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:46,761 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:46,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:01:46,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:01:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:01:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882569188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:47,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:01:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331928758] [2022-11-16 12:01:47,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:47,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:01:47,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:01:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:01:47,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:01:47,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 2459 transitions, 62960 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:47,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:01:47,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:01:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:01,197 INFO L130 PetriNetUnfolder]: 3937/12571 cut-off events. [2022-11-16 12:02:01,197 INFO L131 PetriNetUnfolder]: For 439006/439011 co-relation queries the response was YES. [2022-11-16 12:02:01,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122645 conditions, 12571 events. 3937/12571 cut-off events. For 439006/439011 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 142831 event pairs, 208 based on Foata normal form. 9/12497 useless extension candidates. Maximal degree in co-relation 122470. Up to 3189 conditions per place. [2022-11-16 12:02:01,468 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2016 selfloop transitions, 1454 changer transitions 6/3521 dead transitions. [2022-11-16 12:02:01,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3521 transitions, 97274 flow [2022-11-16 12:02:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:02:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-16 12:02:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3362 transitions. [2022-11-16 12:02:01,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2022-11-16 12:02:01,473 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3362 transitions. [2022-11-16 12:02:01,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3362 transitions. [2022-11-16 12:02:01,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:01,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3362 transitions. [2022-11-16 12:02:01,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.127272727272725) internal successors, (3362), 55 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:01,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:01,485 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:01,485 INFO L175 Difference]: Start difference. First operand has 617 places, 2459 transitions, 62960 flow. Second operand 55 states and 3362 transitions. [2022-11-16 12:02:01,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3521 transitions, 97274 flow [2022-11-16 12:02:12,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 3521 transitions, 96071 flow, removed 471 selfloop flow, removed 16 redundant places. [2022-11-16 12:02:12,780 INFO L231 Difference]: Finished difference. Result has 677 places, 3051 transitions, 84491 flow [2022-11-16 12:02:12,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=62235, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=84491, PETRI_PLACES=677, PETRI_TRANSITIONS=3051} [2022-11-16 12:02:12,781 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 605 predicate places. [2022-11-16 12:02:12,782 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3051 transitions, 84491 flow [2022-11-16 12:02:12,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:12,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:12,782 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:12,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-16 12:02:12,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:12,983 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1527497207, now seen corresponding path program 16 times [2022-11-16 12:02:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:12,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986860778] [2022-11-16 12:02:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:13,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986860778] [2022-11-16 12:02:13,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986860778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601085759] [2022-11-16 12:02:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:02:13,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:13,187 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:13,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:02:13,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:02:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:02:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:13,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:13,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601085759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:13,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:13,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-16 12:02:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335621286] [2022-11-16 12:02:13,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:13,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:02:13,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:02:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:02:13,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:02:13,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3051 transitions, 84491 flow. Second operand has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:13,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:13,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:02:13,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:30,537 INFO L130 PetriNetUnfolder]: 4270/13579 cut-off events. [2022-11-16 12:02:30,537 INFO L131 PetriNetUnfolder]: For 549071/549077 co-relation queries the response was YES. [2022-11-16 12:02:30,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138524 conditions, 13579 events. 4270/13579 cut-off events. For 549071/549077 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 156188 event pairs, 264 based on Foata normal form. 151/13671 useless extension candidates. Maximal degree in co-relation 138327. Up to 4868 conditions per place. [2022-11-16 12:02:30,862 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1673 selfloop transitions, 1838 changer transitions 5/3561 dead transitions. [2022-11-16 12:02:30,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 3561 transitions, 104807 flow [2022-11-16 12:02:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:02:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 12:02:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2072 transitions. [2022-11-16 12:02:30,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7657058388765706 [2022-11-16 12:02:30,866 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2072 transitions. [2022-11-16 12:02:30,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2072 transitions. [2022-11-16 12:02:30,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:30,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2072 transitions. [2022-11-16 12:02:30,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.78787878787879) internal successors, (2072), 33 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,873 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,873 INFO L175 Difference]: Start difference. First operand has 677 places, 3051 transitions, 84491 flow. Second operand 33 states and 2072 transitions. [2022-11-16 12:02:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 3561 transitions, 104807 flow [2022-11-16 12:02:43,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 3561 transitions, 104390 flow, removed 144 selfloop flow, removed 17 redundant places. [2022-11-16 12:02:43,909 INFO L231 Difference]: Finished difference. Result has 712 places, 3317 transitions, 99133 flow [2022-11-16 12:02:43,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=84095, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=99133, PETRI_PLACES=712, PETRI_TRANSITIONS=3317} [2022-11-16 12:02:43,912 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 640 predicate places. [2022-11-16 12:02:43,913 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 3317 transitions, 99133 flow [2022-11-16 12:02:43,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:43,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:43,914 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:43,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:44,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:44,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash 446491075, now seen corresponding path program 17 times [2022-11-16 12:02:44,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601255150] [2022-11-16 12:02:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:44,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601255150] [2022-11-16 12:02:44,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601255150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:44,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280881702] [2022-11-16 12:02:44,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:02:44,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:44,291 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:44,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:02:44,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:02:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:02:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:44,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:44,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280881702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:44,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:44,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:02:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112570070] [2022-11-16 12:02:44,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:44,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:02:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:02:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:02:44,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:02:44,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 3317 transitions, 99133 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:44,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:44,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:02:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:05,188 INFO L130 PetriNetUnfolder]: 4497/14251 cut-off events. [2022-11-16 12:03:05,189 INFO L131 PetriNetUnfolder]: For 700956/700961 co-relation queries the response was YES. [2022-11-16 12:03:05,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158246 conditions, 14251 events. 4497/14251 cut-off events. For 700956/700961 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 165177 event pairs, 324 based on Foata normal form. 4/14175 useless extension candidates. Maximal degree in co-relation 158027. Up to 5043 conditions per place. [2022-11-16 12:03:05,603 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2565 selfloop transitions, 997 changer transitions 8/3615 dead transitions. [2022-11-16 12:03:05,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 3615 transitions, 114306 flow [2022-11-16 12:03:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:03:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:03:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2022-11-16 12:03:05,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2022-11-16 12:03:05,606 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2022-11-16 12:03:05,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2022-11-16 12:03:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:05,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2022-11-16 12:03:05,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:05,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:05,614 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:05,614 INFO L175 Difference]: Start difference. First operand has 712 places, 3317 transitions, 99133 flow. Second operand 37 states and 2265 transitions. [2022-11-16 12:03:05,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 3615 transitions, 114306 flow [2022-11-16 12:03:21,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 3615 transitions, 113395 flow, removed 442 selfloop flow, removed 3 redundant places. [2022-11-16 12:03:21,820 INFO L231 Difference]: Finished difference. Result has 758 places, 3422 transitions, 105035 flow [2022-11-16 12:03:21,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=98131, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=105035, PETRI_PLACES=758, PETRI_TRANSITIONS=3422} [2022-11-16 12:03:21,824 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 686 predicate places. [2022-11-16 12:03:21,824 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 3422 transitions, 105035 flow [2022-11-16 12:03:21,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:21,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:21,825 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:21,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:22,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:22,030 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2068401477, now seen corresponding path program 18 times [2022-11-16 12:03:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248144782] [2022-11-16 12:03:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:22,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:22,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248144782] [2022-11-16 12:03:22,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248144782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556299413] [2022-11-16 12:03:22,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:03:22,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:22,251 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:22,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:03:22,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:03:22,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:22,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:03:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:22,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:22,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556299413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:22,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:22,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:03:22,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714207857] [2022-11-16 12:03:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:03:22,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:03:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:03:22,724 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:03:22,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 3422 transitions, 105035 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:22,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:22,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:03:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:43,319 INFO L130 PetriNetUnfolder]: 4494/14218 cut-off events. [2022-11-16 12:03:43,319 INFO L131 PetriNetUnfolder]: For 728239/728244 co-relation queries the response was YES. [2022-11-16 12:03:43,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161581 conditions, 14218 events. 4494/14218 cut-off events. For 728239/728244 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 164811 event pairs, 253 based on Foata normal form. 1/14142 useless extension candidates. Maximal degree in co-relation 161350. Up to 6574 conditions per place. [2022-11-16 12:03:43,752 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2738 selfloop transitions, 668 changer transitions 5/3456 dead transitions. [2022-11-16 12:03:43,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 3456 transitions, 112599 flow [2022-11-16 12:03:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:03:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:03:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-11-16 12:03:43,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-11-16 12:03:43,754 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-11-16 12:03:43,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-11-16 12:03:43,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:43,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-11-16 12:03:43,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,757 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,757 INFO L175 Difference]: Start difference. First operand has 758 places, 3422 transitions, 105035 flow. Second operand 18 states and 1101 transitions. [2022-11-16 12:03:43,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 3456 transitions, 112599 flow [2022-11-16 12:04:00,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 3456 transitions, 112220 flow, removed 109 selfloop flow, removed 13 redundant places. [2022-11-16 12:04:00,453 INFO L231 Difference]: Finished difference. Result has 760 places, 3420 transitions, 105973 flow [2022-11-16 12:04:00,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=104658, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=105973, PETRI_PLACES=760, PETRI_TRANSITIONS=3420} [2022-11-16 12:04:00,455 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 688 predicate places. [2022-11-16 12:04:00,455 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 3420 transitions, 105973 flow [2022-11-16 12:04:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:00,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:00,455 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:00,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:00,656 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1897516343, now seen corresponding path program 19 times [2022-11-16 12:04:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800361509] [2022-11-16 12:04:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:00,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800361509] [2022-11-16 12:04:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800361509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465876277] [2022-11-16 12:04:00,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:04:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:00,815 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:00,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeb43e4-8af8-46f5-b1bf-6246bb1981d7/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:04:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:00,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:04:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:01,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:01,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465876277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:01,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:01,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-16 12:04:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458834347] [2022-11-16 12:04:01,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:04:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:04:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:04:01,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-16 12:04:01,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 3420 transitions, 105973 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:01,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:01,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-16 12:04:01,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand